February 2007 - ogsa-hpcp-wg

HPC Profile editor submission for public comment
by Hiro Kishimoto 20 Feb '07

20 Feb '07

Hi all, Today I come across Marty Humphrey has submitted revised document to OGF Editor for public comment. The latest document is not on the GridForge HPCP project but you can find this at: https://forge.gridforum.org/sf/go/artf5691 -- Hiro Kishimoto

2 1

A paper that might be of interest
by Ian Foster 14 Feb '07

14 Feb '07

"GT4 GRAM: A Functionality and Performance Study"

1 0

Re: [ogsa-hpcp-wg] [OGSA-BES-WG] BES Last Call
by Christopher Smith 14 Feb '07

14 Feb '07

Right ... as Karl says. -- Chris On 12/2/07 23:04, "Karl Czajkowski" <karlcz(a)univa.com> wrote: > On Feb 13, Andreas Savva modulated: > ... >> I asked the initial question because I could not understand why the case >> of giving an OS value from the JSDL-defined enumeration (well-defined >> presumably) would fall in the same category as that of specifying a >> fractional or negative value for CPUCount. >> > > I think Chris sees this as an "out of range" error for the > implementation, without distinguishing necessarily between > "consistent, but not available in my resource manager", and > "inconsistent". It is just a constraint that fails to match. > > In the general case, this distinction may be incomputable, though some > (optional) validation and analysis could weed out common > inconsistencies before handing the constraint to the solver. (Right, > Chris?) > > This is an area where I can see the value in being liberal in the > specification requirements to allow for a range of implementations. > The only issue is making sure the concept space is modeled such that a > less discerning implementation returns a more generic error and not a > detailed but mischaracterized description of what is going on... it is > that latter bit which pollutes the value of the detailed faults from > an interop point of view. > > > karl

2 1

Re: [ogsa-hpcp-wg] [OGSA-BES-WG] BES Last Call
by Christopher Smith 13 Feb '07

13 Feb '07

Comments for some of the issues inline ... not sure I have answers for all of them. -- Chris On 08/2/07 13:11, "Joseph Bester" <bester(a)mcs.anl.gov> wrote: > Sorry for coming in so late to this discussion. As I wasn't too > involved in the earlier drafts, I'm not sure how much of this has > been covered already. Below are my questions and comments on the > latest draft. Each concern is separated by a -- and tries to refer to > the nearest heading or subheading title in the document. > > joe > > Naming Activities: Endpoint References >> A BES implementation MUST always present an XML anyURI to > clients and this >> single anyURI MUST be one of a well-defined set of URIs that > represent the >> types of endpoints that the BES implementation deals with. Two > URIs are >> defined: >> http://schemas.ggf.org/bes/2006/08/bes/naming/BasicWSAddressing >> http://schemas.ggf.org/bes/2006/08/bes/naming/WS-Naminghttp:// > schemas.ggf.org/bes/2006/08/bes/naming/WS-Naming > > I think this is referring to the NamingProfile BES-Factory attribute, > but it is quite unclear from the context. Is it strictly required to > have only those > two URIs hard-coded and not have extensibility here? > It is intended to be extensible. The context should be clarified by referring to the factory attribute. > -- > > Defining Valid Specializations > >> BESs MUST not implement such specialization profiles. More > specifically, any >> specialization profile that a BES implements MUST obey the > following rules >> regarding sub-state definitions and allowed state transitions: >> >> 1. A specialization can introduce sub-states only by replacing a > state in the >> state model that it is specializing (which itself may be a > specialization of >> some other state model) with a graph of sub-states and state > transitions >> among those sub-states. >> 2. A state transition from any sub-state in the specialization to > another >> state, S, in the unspecialized state model may only occur if a > corresponding >> state transition already existed in the unspecialized state model > from the >> state that has been replaced, R, to that state S. > > The wording of #1 is a little bit amiguous: it might be interpreted > as stating > that specialized states must only have transitions within the new > substate > graph. It might also clarify things to explicitly allow transitions to > substates of S in #2. > So I actually found the description quite clear. The text says that the specialization must support both 1 and 2. 1 says that you can define whatever state diagram you want within the confines of the specialized state, and 2 says how your sub-states transition into the rest of the unspecialized state diagram. I can't explicitly allow transitions to substates of S (i.e. other specializations) because my specialization only has explicit knowledge of the state it's specializing and the unspecialized state diagram that is described in BES. > -- > > Composition of Specializations [1] and Specialized Fault Responses [2] > [1] >> This case raises the question of what to tell a client about their > request, >> and when. The client may wish to receive a response to its request >> immediately, telling it that the request will eventually be > applied once the >> relevant activity has progressed to a suitable sub-state. > Alternatively, the >> client may wish to receive a response to its request only when the > requested >> change has actually occurred. To support both response cases > requires that >> clients can specify in a request whether they wish to receive an > immediate >> response back or whether they wish to only receive a response once > the >> request has actually been acted upon. In the former case a client > must be >> prepared to receive back a fault response indicating that their > request will >> eventually be applied. > [2] >> The OperationWillBeAppliedEventuallyFault is used by the BES to > indicate to >> the client that the requested state operation is allowed, but that > the >> operation can not be applied immediately given the current > Activity state. By >> throwing this fault, the BES indicates to the client that it will > apply the >> requested operation when the Activity state allows. For example, > an Activity >> in Running:Migrating sub-state can not be put into > Running:Suspended, until >> the Activity has completed the migration operation, and is back in > the >> Running:On-resource sub-state. > > I'm not terribly happy with this particular fault. It seems like this > is a > gap in the state transition diagram for the substates---the > server is moving the job into some intermediate state (between > migrating and > suspended in this example) rather than to the desired state. Since > the server > intends to move to the suspended state, it seems like a poor > candidate for a > fault. Also, this fault isn't actually used in the description of the > only > client-initialized state transition (TerminateActivities) > Well ... the BES may have any number of internal states that it uses to implement it's functionality. The point is that the client sees the published state diagram, and any specializations that it chooses to understand. Good point on TerminateActivities ... it should be listed as one of the faults. > -- > > Representing sub-states > > > There isn't a clear XML example of how a union state would look. The > reference to section 4.3 > is wrong---that part is about specialized fault responses. > Yes ... a non-normative example would be useful. > -- > > BES-Management Port-type (Attributes and Operations) > > Port-type vs Port-Type in subsequent sections. No Attributes are > described in > this section despite the heading. > It was a placeholder, but no attributes were defined. The bits in the parentheses should be removed. > -- > > BES-Factory attributes > > General note: not all attributes in the table are listed in the schema > (I noticed TotalNumberOfActivities and > TotalNumberofContainedResources were > missing) > I apologize ... must have been some kind of cut and paste error, as these elements are definitely in my schema. >> ContainedResource anyType > > Is it intended to use an anyType holding a > BasicResourceAttributesDocument > or FactoryResourceAttributesDocument or is it intended to have the > ContainedResource element be of type > BasicResourceAttributesDocumentType or > FactoryResourceAttributesDocumentType? > > To clarify what I mean: > >  > <ContainedResource> > <FactoryResourceAttributesDocumentType> > <IsAcceptingNewActivities>true</IsAcceptingNewActivities> > </FactoryResourceAttributesDocumentType> > </ContainedResource> > > or > >  > <ContainedResource xsi:type="FactoryResourceAttributesDocumentType"> > <IsAcceptingNewActivities>true</IsAcceptingNewActivities> > </ContainedResource> > It is intended to be the second. It is stated in section 6.1.7 that this is the case, but I guess it's not clear enough. Can you suggest some alternative text? > -- > > BES-Factory attributes >> LocalResourceManagerType URI > Should there be a specific URI defined for the case where the BES > acts as a > facade for one or more other BESes? (one of the use cases described > in this doc). > Sounds like a decent idea, but I forsee multiple implementations of even this use case, so I think it's better to leave this up to the implementation. > -- > > BES-Factory Attributes: TotalNumberOfActivities > BES-Factory Attributes: TotalNumberOfContainedResources > These are listed as mandatory attributes. Are they essential to the > operation > of the BES factory? > Yes. The text does not mandate that the BES must return the list of activity references or contained resources (e.g. maybe it would choose not to return details due to authorization constraints). Having these counters available means that a client can distinguish between no activities in the BES, and activities that it isn't being shown. > -- > > BES-Factory Attributes: ActivityReference > The description says *all* of the currrently contained activities > should be > listed. I would expect in a Grid environment sometimes it would makes > sense to > restrict the ActivityReference list to those activities which the > requester is > authorized to view or manipulate. > Right ... I agree that the text should be clarified. > -- > > BESExtension > > The list of valid values might be better listed as list of example > values. The names should be closer to the extension definitions. > Yes ... the text should be clarified. > -- > > BES-Factory Operations > >> If a request fails for some reason that applies to all the > specified activitiese.g., due to an >> authorization faultthen the BES MUST respond with an appropriate > fault response message. > > Is there a reason to require this different fault processing on the > service as opposed to folding this into the other fault handling case? > Can you clarify "other fault handling case"? Do you mean the operation returning a fault? If so, the reason is that there is a vector of inputs, and a sub set of the vector might succeed, so that the operation can succeed, but individual activities need to be flagged for faults. >> If a request can succeed for one or more of the specified > activities then the BES MUST respond with a > vector of response > elements, where each element corresponds to the equivalent activity > designated in > the input EPR vector. Each response element MUST be > either an element describing the results of the >> request, as applied to the designated activity, or a SOAP-1.1 > fault element describing why the >> request could not be applied to the designated activity (e.g., > because the EPR could not be resolved >> to any known activity within the BES). > > I'm a little nervous about explicitly referring to SOAP 1.1 Fault > types in the schema instead of including only BES-specific faults > here. A little nervous, or nervous enough to suggest an alternative. :-) It's just a rendering question. > Also, the "either" part of the response is not enforced in the > XML schema---probably simplest as a choice, though there are many > ways to do so in a schema doc. > Some feedback received from Microsoft's Web Services team indicated we should avoid 'choice'. Can you provide an example of how you would like to see this rendered? > -- > > CreateActivity Output(s) > >> CreateActivityResponseType Response: On success, Response contains > an ActivityIdentifier (EPR) >> identifying the requested activity. An ActivityDocument element > MAY be included representing the >> current representation of the requested activity. This operation > may include a NotAuthorizedFault >> SOAP fault in the result element indicating that while the front- > end (i.e. BES web service) was able >> to validate the incoming user credentials, the back-end would not > permit the operation given the >> credentials supplied. This can happen for example when a BES > implements its activities by fork/ >> exec¹ing those applications using su. > > Is this fault text correct? It seems odd to describe a fault in the > response section (and it doesn't seem to appear in the schema for the > service). > The text should be moved to the fault section. > -- > > CreateActivity Fault(s) > >> InvalidRequestMessageFault: An element in the request message is > not recognized. The elements that >> are not recognized are described in the body of the fault. This > does not mean that the element >> itself is in error, but rather that it specifies a syntactically > correct value which does not in fact >> make sense. For example, the number of CPUs is represented by a > double, so fractional values are >> syntactically correct, but would cause this fault to be thrown as > they do not make sense in the >> context given. > > This seems confusing when compared to the UnsupportedFeatureFault. > Perhaps this could be renamed to something containing the word > "unsatisfiable" to match more closely the JSDL notational conventions. > This would also handle the multitude of fault specializations which > could reasonably be generated BES implementations (too many cpus > requested, insufficient memory, invalid host, etc) > Seems like a nice clarification. I'd be ok with it. > -- > > GetActivityStatuses / TerminateActivities > >> EPR[] ActivityIdentifier: A vector of zero or more EPRs (obtained > from previous CreateActivity >> operations) > Zero doesn't make sense here, does it? > True ... I would make minOccurs=1". > -- > > GetActivityStatuses > >> Since the BES specification allows for extensible activity state > diagrams, it is possible that not >> all states within the state diagram will be relevant/meaningful to > a particular client. BES requires >> that all legal state transitions are transitioned even if they are > not relevant to a particular >> client. For instance, if an empty JSDL document is submitted to > the BES then all the states from New >> to Finished will be transitioned through even though there is no > underlying specified activity. > > Does this text belong in this section? The New state is not mentioned > elsewhere. > An artifact from an older version. I would vote for the removal of this text. > -- > > GetActivityStatuses / TerminateActivities > > InvalidRequestMessageFault > > Does this fault make sense for these operations? > Yes, since all messages allow for extension content. Maybe it also needs unsupported feature? > -- > >> TerminateActivityResponseType[] Response: A vector detailing the > responses of the BES to the >> termination requests. The Terminated element is a boolean value > indicating whether the BES >> successfully (true) terminated the activity or not (false). If > true is returned, then the associated >> activity is now in the Terminated state. If false is returned then > the activity MAY eventually >> transition to the Terminated state. If an activity specified in > the input cannot be located or cannot >> be terminated for some reason then the TerminateResponse MUST > contain a SOAP-1.1 fault element >> instead of a Terminated element. > > The interface for this might be slightly more useful if it were to > return the activity status instead of the boolean value. > I agree. > > BES-Activity Port-type > >> The BES-Activity port-type defines operations for monitoring and > managing individual activities. >> These operations are intended to be applied to EPRs returned by > previous CreateActivity operations. >> Returning an EPR that supports the BES-Activity Port-type is > optional in the CreateActivity operation >> of the BES-Factory Port-type. > > Actually, this port type is not defined in this document at all. This > section is a definition for an activity document which can be used in > some messaging by the BES Factory port type. > A placeholder ... should be cleaned up.

2 1

Re: [ogsa-hpcp-wg] [OGSA-BES-WG] BES Last Call
by Christopher Smith 13 Feb '07

13 Feb '07

On 06/2/07 19:41, "Andreas Savva" <andreas.savva(a)jp.fujitsu.com> wrote: > Chris, > > Chris Smith wrote: >> UnsupportedFeatureFault indicates that a particular element or attribute >> contained within the JSDL document is either not supported, or (for >> extension content) not supported or recognized. >> >> InvalidRequestMessageFault indicates that the value of some element is >> invalid input. For example, if TotalCPUCount in JSDL was given as -10. > > This is nice text and I hope it is included in the BES spec. "...not > recognized" is not correct. > The recognized part referred to extension content where the element might not be known to the consuming system (as opposed to being known, but unsupported). I have no problems dropping it. > Also given the above, HPC Profile sections 3.9 and 3.10 specify the > wrong value for the returned fault. For example in 3.9 it says > >> If the consuming system does not provide the requested operating system, >> or if the JSDL special token ³other² is used as the content of the >> jsdl:OperatingSystemName sub-element, and if the consuming system does >> not understand the provided extension content, then the consuming system >> MAY return the BES InvalidRequestMessageFault to the requester. > > It should be UnsupportedFeatureFault. (And why is the fault returned a > MAY and not a MUST for the profile?) > Ahh ... it is InvalidRequestMessage ... that's because the element (OperatingSystemName) is recognized and supported by the system, but the "value" of OperatingSystemName is not recognized. I know this seems in conflict with the statements about UnsupportedFeatureFault above, but in this case, the extension elements are the "value" of the OperatingSystemName element (if that makes sense). The reason for the MAY is in the phrase "If the consuming system does not provide the requested operating system....". Some systems may choose to accept the JSDL as is, and might just have an activity whose resource requirements can never be satisfied (unless an operating system of that type is configured in the system and made available to the BES). This would be the case for my BES implementation on top of LSF, which allows one to specify resources that may never be satisfied. -- Chris

2 3

Re: [ogsa-hpcp-wg] [OGSA-BES-WG] BES Last Call
by Christopher Smith 09 Feb '07

09 Feb '07

So I will agree that the MAY should be MUST (like stated in the other email I just sent). As for the use of these, it's quite clear to me. One fault is used to indicate to the client that the JSDL they are providing (and the extensions to the JSDL that they use) are not implemented in the BES. The other is used to say that I do indeed recognize that JSDL construct, but you have put something in it that doesn't make sense to me. That is, to me, the principal guiding the use of one over the other. -- Chris On 08/2/07 19:01, "Karl Czajkowski" <karlcz(a)univa.com> wrote: > On Feb 08, Christopher Smith modulated: > ... >> The reason for the MAY is in the phrase "If the consuming system does not >> provide the requested operating system....". Some systems may choose to >> accept the JSDL as is, and might just have an activity whose resource >> requirements can never be satisfied (unless an operating system of that type >> is configured in the system and made available to the BES). This would be >> the case for my BES implementation on top of LSF, which allows one to >> specify resources that may never be satisfied. >> > > Chris, I think you are trying to get at some awfully subtle > distinctions here. Where do you draw the line between: > > 1. XML unparseable (malformed) > 2. XML unvalidatable (extension schema not known) > 3. semantically inconsistent (schema allows meaningless expressions) > 4. not supported by implementation > 5. resources "never" available (not configured in cluster, etc.) > 6. resources "temporarily" unavailable (due to load, etc.) > 7. resources unavailable for given user role (due to policy, etc.) > ... > > It would seem to me that you want to be careful in making sure faults > are also interoperable if you are going to model them. Can a > programmatic client behavior take a meaningfully different fault > response action based on the fault type here? Or does this boil down > to the fault indicating "the service did not like it" and there being > some hints that a human might find useful during fault determination? > > This leads me to wonder if there is any real information captured in > these very similar fault messages. If a system MAY report something > as invalid when it might really be extensible value content not > understood by the system, and if a system MAY accept something that is > contradictory, what exactly is being communicated? > > It would seem to me that you need a fault "lattice" where the most > generic fault at the bottom can be generated and understood by any > sensible implementation, while the more precise faults should have > more stringent requirements on when they can be signalled. I don't > think you want to model subtle faults and then allow implementations > to be liberal in what they generate here, as that would fail to encode > real information for further processing decisions. > > > karl

1 0

Re: [ogsa-hpcp-wg] [OGSA-BES-WG] BES Last Call
by Andreas Savva 09 Feb '07

09 Feb '07

If I may, I have an additional comment on the following point: > Naming Activities: Endpoint References > > A BES implementation MUST always present an XML anyURI to > clients and this > > single anyURI MUST be one of a well-defined set of URIs that > represent the > > types of endpoints that the BES implementation deals with. Two > URIs are > > defined: > > http://schemas.ggf.org/bes/2006/08/bes/naming/BasicWSAddressing > > http://schemas.ggf.org/bes/2006/08/bes/naming/WS-Naminghttp:// > schemas.ggf.org/bes/2006/08/bes/naming/WS-Naming > > I think this is referring to the NamingProfile BES-Factory attribute, > but it is quite unclear from the context. Is it strictly required to > have only those > two URIs hard-coded and not have extensibility here? At GGF18 during a BES session and when reviewing BES draft 28 (I think) we agreed to remove these BES WS-Naming URIs because WS-Naming was defining a bunch of them already. There is no reason to have duplicate definitions. Also because WS-Naming defines separate claim URIs for each of its sub-profiles (and because an implementation is free to claim support for any set of those sub-profiles) we agreed that a BES implementation may present "one or more" naming URIs to indicate which set of naming conventions it supports. (Hopefully Mark and Andrew should remember that discussion.) Andreas Joseph Bester wrote: > Sorry for coming in so late to this discussion. As I wasn't too > involved in the earlier drafts, I'm not sure how much of this has > been covered already. Below are my questions and comments on the > latest draft. Each concern is separated by a -- and tries to refer to > the nearest heading or subheading title in the document. > > joe > > Naming Activities: Endpoint References > > A BES implementation MUST always present an XML anyURI to > clients and this > > single anyURI MUST be one of a well-defined set of URIs that > represent the > > types of endpoints that the BES implementation deals with. Two > URIs are > > defined: > > http://schemas.ggf.org/bes/2006/08/bes/naming/BasicWSAddressing > > http://schemas.ggf.org/bes/2006/08/bes/naming/WS-Naminghttp:// > schemas.ggf.org/bes/2006/08/bes/naming/WS-Naming > > I think this is referring to the NamingProfile BES-Factory attribute, > but it is quite unclear from the context. Is it strictly required to > have only those > two URIs hard-coded and not have extensibility here? > > -- > > Defining Valid Specializations > > > BESs MUST not implement such specialization profiles. More > specifically, any > > specialization profile that a BES implements MUST obey the > following rules > > regarding sub-state definitions and allowed state transitions: > > > > 1. A specialization can introduce sub-states only by replacing a > state in the > > state model that it is specializing (which itself may be a > specialization of > > some other state model) with a graph of sub-states and state > transitions > > among those sub-states. > > 2. A state transition from any sub-state in the specialization to > another > > state, S, in the unspecialized state model may only occur if a > corresponding > > state transition already existed in the unspecialized state model > from the > > state that has been replaced, R, to that state S. > > The wording of #1 is a little bit amiguous: it might be interpreted > as stating > that specialized states must only have transitions within the new > substate > graph. It might also clarify things to explicitly allow transitions to > substates of S in #2. > > -- > > Composition of Specializations [1] and Specialized Fault Responses [2] > [1] > > This case raises the question of what to tell a client about their > request, > > and when. The client may wish to receive a response to its request > > immediately, telling it that the request will eventually be > applied once the > > relevant activity has progressed to a suitable sub-state. > Alternatively, the > > client may wish to receive a response to its request only when the > requested > > change has actually occurred. To support both response cases > requires that > > clients can specify in a request whether they wish to receive an > immediate > > response back or whether they wish to only receive a response once > the > > request has actually been acted upon. In the former case a client > must be > > prepared to receive back a fault response indicating that their > request will > > eventually be applied. > [2] > > The OperationWillBeAppliedEventuallyFault is used by the BES to > indicate to > > the client that the requested state operation is allowed, but that > the > > operation can not be applied immediately given the current > Activity state. By > > throwing this fault, the BES indicates to the client that it will > apply the > > requested operation when the Activity state allows. For example, > an Activity > > in Running:Migrating sub-state can not be put into > Running:Suspended, until > > the Activity has completed the migration operation, and is back in > the > > Running:On-resource sub-state. > > I'm not terribly happy with this particular fault. It seems like this > is a > gap in the state transition diagram for the substates---the > server is moving the job into some intermediate state (between > migrating and > suspended in this example) rather than to the desired state. Since > the server > intends to move to the suspended state, it seems like a poor > candidate for a > fault. Also, this fault isn't actually used in the description of the > only > client-initialized state transition (TerminateActivities) > > -- > > Representing sub-states > > > There isn't a clear XML example of how a union state would look. The > reference to section 4.3 > is wrong---that part is about specialized fault responses. > > -- > > BES-Management Port-type (Attributes and Operations) > > Port-type vs Port-Type in subsequent sections. No Attributes are > described in > this section despite the heading. > > -- > > StopAcceptingNewActivities, StartAcceptingNewActivities > > Output(s) > > - None. The response message will be sent once the BES has stopped > > accepting new activity creation requests. > > - None. The response message will be sent once the BES has started > accepting > > new activity creation requests > > > Is it necessary to allow the service to block the client for an > indeterminate time? Other state > transitions described in the doc allow for a BES implementation to > intend to make the state change > without guaranteeing that it is done before the reply is made. > > -- > > BES-Factory attributes > > General note: not all attributes in the table are listed in the schema > (I noticed TotalNumberOfActivities and > TotalNumberofContainedResources were > missing) > > > ContainedResource anyType > > Is it intended to use an anyType holding a > BasicResourceAttributesDocument > or FactoryResourceAttributesDocument or is it intended to have the > ContainedResource element be of type > BasicResourceAttributesDocumentType or > FactoryResourceAttributesDocumentType? > > To clarify what I mean: > >  > <ContainedResource> > <FactoryResourceAttributesDocumentType> > <IsAcceptingNewActivities>true</IsAcceptingNewActivities> > </FactoryResourceAttributesDocumentType> > </ContainedResource> > > or > >  > <ContainedResource xsi:type="FactoryResourceAttributesDocumentType"> > <IsAcceptingNewActivities>true</IsAcceptingNewActivities> > </ContainedResource> > > -- > > BES-Factory attributes > > LocalResourceManagerType URI > Should there be a specific URI defined for the case where the BES > acts as a > facade for one or more other BESes? (one of the use cases described > in this doc). > > -- > > BES-Factory Attributes: TotalNumberOfActivities > BES-Factory Attributes: TotalNumberOfContainedResources > These are listed as mandatory attributes. Are they essential to the > operation > of the BES factory? > > -- > > BES-Factory Attributes: ActivityReference > The description says *all* of the currrently contained activities > should be > listed. I would expect in a Grid environment sometimes it would makes > sense to > restrict the ActivityReference list to those activities which the > requester is > authorized to view or manipulate. > > -- > > BESExtension > > The list of valid values might be better listed as list of example > values. The names should be closer to the extension definitions. > > -- > > BES-Factory Operations > > > If a request fails for some reason that applies to all the > specified activities—e.g., due to an > > authorization fault—then the BES MUST respond with an appropriate > fault response message. > > Is there a reason to require this different fault processing on the > service as opposed to folding this into the other fault handling case? > > > If a request can succeed for one or more of the specified > activities then the BES MUST respond with a > vector of response > elements, where each element corresponds to the equivalent activity > designated in > the input EPR vector. Each response element MUST be > either an element describing the results of the > > request, as applied to the designated activity, or a SOAP-1.1 > fault element describing why the > > request could not be applied to the designated activity (e.g., > because the EPR could not be resolved > > to any known activity within the BES). > > I'm a little nervous about explicitly referring to SOAP 1.1 Fault > types in the schema instead of including only BES-specific faults > here. Also, the "either" part of the response is not enforced in the > XML schema---probably simplest as a choice, though there are many > ways to do so in a schema doc. > > -- > > CreateActivity Output(s) > > > CreateActivityResponseType Response: On success, Response contains > an ActivityIdentifier (EPR) > > identifying the requested activity. An ActivityDocument element > MAY be included representing the > > current representation of the requested activity. This operation > may include a NotAuthorizedFault > > SOAP fault in the result element indicating that while the front- > end (i.e. BES web service) was able > > to validate the incoming user credentials, the back-end would not > permit the operation given the > > credentials supplied. This can happen for example when a BES > implements its activities by fork/ > > exec’ing those applications using su. > > Is this fault text correct? It seems odd to describe a fault in the > response section (and it doesn't seem to appear in the schema for the > service). > > -- > > CreateActivity Fault(s) > > > InvalidRequestMessageFault: An element in the request message is > not recognized. The elements that > > are not recognized are described in the body of the fault. This > does not mean that the element > > itself is in error, but rather that it specifies a syntactically > correct value which does not in fact > > make sense. For example, the number of CPUs is represented by a > double, so fractional values are > > syntactically correct, but would cause this fault to be thrown as > they do not make sense in the > > context given. > > This seems confusing when compared to the UnsupportedFeatureFault. > Perhaps this could be renamed to something containing the word > "unsatisfiable" to match more closely the JSDL notational conventions. > This would also handle the multitude of fault specializations which > could reasonably be generated BES implementations (too many cpus > requested, insufficient memory, invalid host, etc) > > -- > > GetActivityStatuses / TerminateActivities > > > EPR[] ActivityIdentifier: A vector of zero or more EPRs (obtained > from previous CreateActivity > > operations) > Zero doesn't make sense here, does it? > > -- > > GetActivityStatuses > > > Since the BES specification allows for extensible activity state > diagrams, it is possible that not > > all states within the state diagram will be relevant/meaningful to > a particular client. BES requires > > that all legal state transitions are transitioned even if they are > not relevant to a particular > > client. For instance, if an empty JSDL document is submitted to > the BES then all the states from New > > to Finished will be transitioned through even though there is no > underlying specified activity. > > Does this text belong in this section? The New state is not mentioned > elsewhere. > > -- > > GetActivityStatuses / TerminateActivities > > InvalidRequestMessageFault > > Does this fault make sense for these operations? > > -- > > > TerminateActivityResponseType[] Response: A vector detailing the > responses of the BES to the > > termination requests. The Terminated element is a boolean value > indicating whether the BES > > successfully (true) terminated the activity or not (false). If > true is returned, then the associated > > activity is now in the Terminated state. If false is returned then > the activity MAY eventually > > transition to the Terminated state. If an activity specified in > the input cannot be located or cannot > > be terminated for some reason then the TerminateResponse MUST > contain a SOAP-1.1 fault element > > instead of a Terminated element. > > The interface for this might be slightly more useful if it were to > return the activity status instead of the boolean value. > > -- > > GetActivityDocuments > > Missing heading + same concerns as in BES-Factory Operations above > > -- > > GetAttributesDocument > > The wsdl for this operation doesn't seem to match the description > > -- > > BES-Activity Port-type > > > The BES-Activity port-type defines operations for monitoring and > managing individual activities. > > These operations are intended to be applied to EPRs returned by > previous CreateActivity operations. > > Returning an EPR that supports the BES-Activity Port-type is > optional in the CreateActivity operation > > of the BES-Factory Port-type. > > Actually, this port type is not defined in this document at all. This > section is a definition for an activity document which can be used in > some messaging by the BES Factory port type. > > -- > > Optional Extensions > > Probably helpful to add the extension URIs in the section defining > the relevant extensions. > > -- > > Idempotent Execution Semantics > > > Should a BES receive a second CreateActivity request that includes > the same identifier as a > > previously received request, the BES MUST not create the requested > activity a second time if it > > already created the activity for the first request > > This should probably read "Should a BES receive a subsequent > CreateActivity request"... > > -- > > Subscription to Notification Events > > > A BES that allows its clients to subscribe for messages concerning > activity state changes MUST do so > > using either the WS-Eventing or WS-Notification protocols. > > Change this to be a MUST only if referring to a BES advertising the > SupportsSubscriptions extension. > > Should additionally list the Topic (for wsnt---not sure about WS- > Eventing) which should be used for the subscription request. > > wsnt prefix isn't defined in the Namespace table in section 1.2 > > -- > > Authors: > Should refer to Argonne National Laboratory not Argonne National Labs > > Since Peter has moved on from Globus/ANL, I'm not sure if Peter Lane > should be listed as author based on the criteria discussed in emails: > > > Greg also takes the view (and the GFSG supports this) that > > anyone listed as an author must individually be willing > > to take full responsibility for the document, now and > > forever. This will go into the revised GFD #1, too. > > It's the important part, in Greg's view. > > -- > ogsa-bes-wg mailing list > ogsa-bes-wg(a)ogf.org > http://www.ogf.org/mailman/listinfo/ogsa-bes-wg -- Andreas Savva Fujitsu Laboratories Ltd

1 0

LAST CALL for HPC Basic Profile doc (make comments before Wed Feb 7)
by Marty Humphrey 06 Feb '07

06 Feb '07

Folks, First, I want to thank everyone for attending today's HPC Profile WG session. I think it was very productive! As we agreed in the session, I am now issuing "LAST CALL" on the HPC Basic Profile doc (available at http://forge.gridforum.org/sf/go/doc13736) Please give it a thorough reading and provide comments BEFORE 1 week from today (that is, make comments before end of day Wed Feb 7). After last call, we'll give it to our area directors, and it will then go into public comment shortly thereafter. Again, thanks a bunch! I think we're making great progress!!! -- Marty

3 2

BES services
by dejw 01 Feb '07

01 Feb '07

Hi all, we are participating in OMII-Europe project and writing some client stuff for BES services and we are looking for some BES services we can use and test our stuff against. Maybe some of you have such service and can share it for tests? So far I have tested some of your services visible here (crown, unicore, cream, gridsam and platform): http://forge.ggf.org/sf/wiki/do/viewPage/projects.ogsa-hpcp-wg/wiki/HomePage Is it possible somehow to test others? If yes please send me all information which will be required to make successful connection, please. Thanks in advance, Best regards, Dawid Szejnfeld, PSNC (http://www.man.poznan.pl/pcss/public/main/index.html?lang=en)

1 0