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Add provisional markers to storage chapter #345

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90 changes: 48 additions & 42 deletions Chap_API_Storage.tex
Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,8 @@
\chapter{Storage Support Definitions}
\label{chap:api_storage}

\provisionalMarker{}

Distributed and parallel computing systems are increasingly embracing storage hierarchies to meet the diverse data management needs of applications and other systems software in a cost-effective manner.
These hierarchies provide access to a number of distinct storage layers, with each potentially composed of different storage hardware (e.g., HDD, SSD, tape, PMEM), deployed at different locations (e.g., on-node, on-switch, on-site, WAN), and designed using different storage paradigms (e.g., file-based, object-based).
Each of these systems offers unique performance and usage characteristics that storage system users should carefully consider to ensure the most efficient use of storage resources.
Expand All @@ -15,30 +17,31 @@ \chapter{Storage Support Definitions}
\section{Storage support constants}

\declarestruct{pmix_storage_medium_t}
\provisionalMarker{}

The \refstruct{pmix_storage_medium_t} is a \code{uint64_t} type that defines a set of bit-mask flags for specifying different types of storage mediums. These can be bitwise OR'd together to accommodate storage systems that mix storage medium types.

\begin{constantdesc}
%
\declareconstitemNEW{PMIX_STORAGE_MEDIUM_UNKNOWN}
\declareconstitemProvisional{PMIX_STORAGE_MEDIUM_UNKNOWN}
The storage medium type is unknown.
%
\declareconstitemNEW{PMIX_STORAGE_MEDIUM_TAPE}
\declareconstitemProvisional{PMIX_STORAGE_MEDIUM_TAPE}
The storage system uses tape media.
%
\declareconstitemNEW{PMIX_STORAGE_MEDIUM_HDD}
\declareconstitemProvisional{PMIX_STORAGE_MEDIUM_HDD}
The storage system uses HDDs with traditional SAS, SATA interfaces.
%
\declareconstitemNEW{PMIX_STORAGE_MEDIUM_SSD}
\declareconstitemProvisional{PMIX_STORAGE_MEDIUM_SSD}
The storage system uses SSDs with traditional SAS, SATA interfaces.
%
\declareconstitemNEW{PMIX_STORAGE_MEDIUM_NVME}
\declareconstitemProvisional{PMIX_STORAGE_MEDIUM_NVME}
The storage system uses SSDs with NVMe interface.
%
\declareconstitemNEW{PMIX_STORAGE_MEDIUM_PMEM}
\declareconstitemProvisional{PMIX_STORAGE_MEDIUM_PMEM}
The storage system uses persistent memory.
%
\declareconstitemNEW{PMIX_STORAGE_MEDIUM_RAM}
\declareconstitemProvisional{PMIX_STORAGE_MEDIUM_RAM}
The storage system is volatile (e.g., tmpfs).
%
\end{constantdesc}
Expand All @@ -50,73 +53,76 @@ \section{Storage support constants}
\adviceimplend

\declarestruct{pmix_storage_accessibility_t}
\provisionalMarker{}

The \refstruct{pmix_storage_accessibility_t} is a \code{uint64_t} type that defines a set of bit-mask flags for specifying different levels of storage accessibility (i.e,. from where a storage system may be accessed). These can be bitwise OR'd together to accommodate storage systems that are accessibile in multiple ways.

\begin{constantdesc}
%
\declareconstitemNEW{PMIX_STORAGE_ACCESSIBILITY_NODE}
\declareconstitemProvisional{PMIX_STORAGE_ACCESSIBILITY_NODE}
The storage system resources are accessible within the same node.
%
\declareconstitemNEW{PMIX_STORAGE_ACCESSIBILITY_SESSION}
\declareconstitemProvisional{PMIX_STORAGE_ACCESSIBILITY_SESSION}
The storage system resources are accessible within the same session.
%
\declareconstitemNEW{PMIX_STORAGE_ACCESSIBILITY_JOB}
\declareconstitemProvisional{PMIX_STORAGE_ACCESSIBILITY_JOB}
The storage system resources are accessible within the same job.
%
\declareconstitemNEW{PMIX_STORAGE_ACCESSIBILITY_RACK}
\declareconstitemProvisional{PMIX_STORAGE_ACCESSIBILITY_RACK}
The storage system resources are accessible within the same rack.
%
\declareconstitemNEW{PMIX_STORAGE_ACCESSIBILITY_CLUSTER}
\declareconstitemProvisional{PMIX_STORAGE_ACCESSIBILITY_CLUSTER}
The storage system resources are accessible within the same cluster.
%
\declareconstitemNEW{PMIX_STORAGE_ACCESSIBILITY_REMOTE}
\declareconstitemProvisional{PMIX_STORAGE_ACCESSIBILITY_REMOTE}
The storage system resources are remote.
%
\end{constantdesc}

\declarestruct{pmix_storage_persistence_t}
\provisionalMarker{}

The \refstruct{pmix_storage_persistence_t} type specifies different levels of persistence for a particular storage system.

\begin{constantdesc}
%
\declareconstitemNEW{PMIX_STORAGE_PERSISTENCE_TEMPORARY}
\declareconstitemProvisional{PMIX_STORAGE_PERSISTENCE_TEMPORARY}
Data on the storage system is persisted only temporarily (i.e, it does not survive across sessions or node reboots).
%
\declareconstitemNEW{PMIX_STORAGE_PERSISTENCE_NODE}
\declareconstitemProvisional{PMIX_STORAGE_PERSISTENCE_NODE}
Data on the storage system is persisted on the node.
%
\declareconstitemNEW{PMIX_STORAGE_PERSISTENCE_SESSION}
\declareconstitemProvisional{PMIX_STORAGE_PERSISTENCE_SESSION}
Data on the storage system is persisted for the duration of the session.
%
\declareconstitemNEW{PMIX_STORAGE_PERSISTENCE_JOB}
\declareconstitemProvisional{PMIX_STORAGE_PERSISTENCE_JOB}
Data on the storage system is persisted for the duration of the job.
%
\declareconstitemNEW{PMIX_STORAGE_PERSISTENCE_SCRATCH}
\declareconstitemProvisional{PMIX_STORAGE_PERSISTENCE_SCRATCH}
Data on the storage system is persisted according to scratch storage policies (short-term storage, typically persisted for days to weeks).
%
\declareconstitemNEW{PMIX_STORAGE_PERSISTENCE_PROJECT}
\declareconstitemProvisional{PMIX_STORAGE_PERSISTENCE_PROJECT}
Data on the storage system is persisted according to project storage policies (long-term storage, typically persisted for the duration of a project).
%
\declareconstitemNEW{PMIX_STORAGE_PERSISTENCE_ARCHIVE}
\declareconstitemProvisional{PMIX_STORAGE_PERSISTENCE_ARCHIVE}
Data on the storage system is persisted according to archive storage policies (long-term storage, typically persisted indefinitely).
%
\end{constantdesc}

\declarestruct{pmix_storage_access_type_t}
\provisionalMarker{}

The \refstruct{pmix_storage_access_type_t} type specifies different storage system access types.

\begin{constantdesc}
%
\declareconstitemNEW{PMIX_STORAGE_ACCESS_RD}
\declareconstitemProvisional{PMIX_STORAGE_ACCESS_RD}
Provide information on storage system read operations.
%
\declareconstitemNEW{PMIX_STORAGE_ACCESS_WR}
\declareconstitemProvisional{PMIX_STORAGE_ACCESS_WR}
Provide information on storage system write operations.
%
\declareconstitemNEW{PMIX_STORAGE_ACCESS_RDWR}
\declareconstitemProvisional{PMIX_STORAGE_ACCESS_RDWR}
Provide information on storage system read and write operations.
%
\end{constantdesc}
Expand All @@ -129,97 +135,97 @@ \section{Storage support attributes}
The following attributes may be returned in response to queries (e.g., \refapi{PMIx_Get} or \refapi{PMIx_Query_info}) made by processes or tools.

%
\declareAttributeNEW{PMIX_STORAGE_ID}{"pmix.strg.id"}{char*}{
\declareAttributeProvisional{PMIX_STORAGE_ID}{"pmix.strg.id"}{char*}{
An identifier for the storage system (e.g., lustre-fs1, daos-oss1, home-fs)
}

%
\declareAttributeNEW{PMIX_STORAGE_PATH}{"pmix.strg.path"}{char*}{
\declareAttributeProvisional{PMIX_STORAGE_PATH}{"pmix.strg.path"}{char*}{
Mount point path for the storage system (valid only for file-based storage systems)
}

%
\declareAttributeNEW{PMIX_STORAGE_TYPE}{"pmix.strg.type"}{char*}{
\declareAttributeProvisional{PMIX_STORAGE_TYPE}{"pmix.strg.type"}{char*}{
Type of storage system (i.e., "lustre", "gpfs", "daos", "ext4")
}

%
\declareAttributeNEW{PMIX_STORAGE_VERSION}{"pmix.strg.ver"}{char*}{
\declareAttributeProvisional{PMIX_STORAGE_VERSION}{"pmix.strg.ver"}{char*}{
Version string for the storage system
}

%
\declareAttributeNEW{PMIX_STORAGE_MEDIUM}{"pmix.strg.medium"}{pmix_storage_medium_t}{
\declareAttributeProvisional{PMIX_STORAGE_MEDIUM}{"pmix.strg.medium"}{pmix_storage_medium_t}{
Types of storage mediums utilized by the storage system (e.g., SSDs, HDDs, tape)
}

%
\declareAttributeNEW{PMIX_STORAGE_ACCESSIBILITY}{"pmix.strg.access"}{pmix_storage_accessibility_t}{
\declareAttributeProvisional{PMIX_STORAGE_ACCESSIBILITY}{"pmix.strg.access"}{pmix_storage_accessibility_t}{
Accessibility level of the storage system (e.g., within same node, within same session)
}

%
\declareAttributeNEW{PMIX_STORAGE_PERSISTENCE}{"pmix.strg.persist"}{pmix_storage_persistence_t}{
\declareAttributeProvisional{PMIX_STORAGE_PERSISTENCE}{"pmix.strg.persist"}{pmix_storage_persistence_t}{
Persistence level of the storage system (e.g., sratch storage or achive storage)
}

%
\declareAttributeNEW{PMIX_QUERY_STORAGE_LIST}{"pmix.strg.list"}{char*}{
\declareAttributeProvisional{PMIX_QUERY_STORAGE_LIST}{"pmix.strg.list"}{char*}{
Comma-delimited list of storage identifiers (i.e., \refattr{PMIX_STORAGE_ID} types) for available storage systems
}

%
\declareAttributeNEW{PMIX_STORAGE_CAPACITY_LIMIT}{"pmix.strg.caplim"}{double}{
\declareAttributeProvisional{PMIX_STORAGE_CAPACITY_LIMIT}{"pmix.strg.caplim"}{double}{
Overall limit on capacity (in bytes) for the storage system
}

%
\declareAttributeNEW{PMIX_STORAGE_CAPACITY_USED}{"pmix.strg.capuse"}{double}{
\declareAttributeProvisional{PMIX_STORAGE_CAPACITY_USED}{"pmix.strg.capuse"}{double}{
Overall used capacity (in bytes) for the storage system
}

%
\declareAttributeNEW{PMIX_STORAGE_OBJECT_LIMIT}{"pmix.strg.objlim"}{uint64_t}{
\declareAttributeProvisional{PMIX_STORAGE_OBJECT_LIMIT}{"pmix.strg.objlim"}{uint64_t}{
Overall limit on number of objects (e.g., inodes) for the storage system
}

%
\declareAttributeNEW{PMIX_STORAGE_OBJECTS_USED}{"pmix.strg.objuse"}{uint64_t}{
\declareAttributeProvisional{PMIX_STORAGE_OBJECTS_USED}{"pmix.strg.objuse"}{uint64_t}{
Overall used number of objects (e.g., inodes) for the storage system
}

%
\declareAttributeNEW{PMIX_STORAGE_MINIMAL_XFER_SIZE}{"pmix.strg.minxfer"}{double}{
\declareAttributeProvisional{PMIX_STORAGE_MINIMAL_XFER_SIZE}{"pmix.strg.minxfer"}{double}{
Minimal transfer size (in bytes) for the storage system - this is the storage system's atomic unit of transfer (e.g., block size)
}

%
\declareAttributeNEW{PMIX_STORAGE_SUGGESTED_XFER_SIZE}{"pmix.strg.sxfer"}{double}{
\declareAttributeProvisional{PMIX_STORAGE_SUGGESTED_XFER_SIZE}{"pmix.strg.sxfer"}{double}{
Suggested transfer size (in bytes) for the storage system
}

%
\declareAttributeNEW{PMIX_STORAGE_BW_MAX}{"pmix.strg.bwmax"}{double}{
\declareAttributeProvisional{PMIX_STORAGE_BW_MAX}{"pmix.strg.bwmax"}{double}{
Maximum bandwidth (in bytes/sec) for storage system - provided as the theoretical maximum or the maximum observed bandwidth value
}

%
\declareAttributeNEW{PMIX_STORAGE_BW_CUR}{"pmix.strg.bwcur"}{double}{
\declareAttributeProvisional{PMIX_STORAGE_BW_CUR}{"pmix.strg.bwcur"}{double}{
Observed bandwidth (in bytes/sec) for storage system - provided as a recently observed bandwidth value, with the exact measurement interval depending on the storage system and/or PMIx library implementation
}

%
\declareAttributeNEW{PMIX_STORAGE_IOPS_MAX}{"pmix.strg.iopsmax"}{double}{
\declareAttributeProvisional{PMIX_STORAGE_IOPS_MAX}{"pmix.strg.iopsmax"}{double}{
Maximum IOPS (in I/O operations per second) for storage system - provided as the theoretical maximum or the maximum observed IOPS value
}

%
\declareAttributeNEW{PMIX_STORAGE_IOPS_CUR}{"pmix.strg.iopscur"}{double}{
\declareAttributeProvisional{PMIX_STORAGE_IOPS_CUR}{"pmix.strg.iopscur"}{double}{
Observed IOPS (in I/O operations per second) for storage system - provided as a recently observed IOPS value, with the exact measurement interval depending on the storage system and/or PMIx library implementation
}

%
\declareAttributeNEW{PMIX_STORAGE_ACCESS_TYPE}{"pmix.strg.atype"}{pmix_storage_access_type_t}{
\declareAttributeProvisional{PMIX_STORAGE_ACCESS_TYPE}{"pmix.strg.atype"}{pmix_storage_access_type_t}{
Qualifier describing the type of storage access to return information for (e.g., for qualifying \refattr{PMIX_STORAGE_BW_CUR}, \refattr{PMIX_STORAGE_IOPS_CUR}, or \refattr{PMIX_STORAGE_SUGGESTED_XFER_SIZE} attributes)
}

Expand Down
74 changes: 74 additions & 0 deletions Chap_Revisions.tex
Original file line number Diff line number Diff line change
Expand Up @@ -1192,4 +1192,78 @@ \subsection{Removed attributes}
Architecture flag.
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%% History: Version 4.1
\section{Version 4.1: TBD}

The v4.1 update includes clarifications and corrections from the v4.0 document:

\begin{compactitemize}
\item Provisional Items:
\begin{compactitemize}
\item Storage \chapterref{chap:api_storage}
\end{compactitemize}
\end{compactitemize}

\subsection{Added Data Structures (Provisional)}

\begin{compactitemize}
\item \refstruct{pmix_storage_medium_t}
\item \refstruct{pmix_storage_accessibility_t}
\item \refstruct{pmix_storage_persistence_t}
\item \refstruct{pmix_storage_access_type_t}
\end{compactitemize}


\subsection{Added Constants (Provisional)}

\littleheader{Storage constants}
\refconst{PMIX_STORAGE_MEDIUM_UNKNOWN} \\
\refconst{PMIX_STORAGE_MEDIUM_TAPE} \\
\refconst{PMIX_STORAGE_MEDIUM_HDD} \\
\refconst{PMIX_STORAGE_MEDIUM_SSD} \\
\refconst{PMIX_STORAGE_MEDIUM_NVME} \\
\refconst{PMIX_STORAGE_MEDIUM_PMEM} \\
\refconst{PMIX_STORAGE_MEDIUM_RAM} \\
\refconst{PMIX_STORAGE_ACCESSIBILITY_NODE} \\
\refconst{PMIX_STORAGE_ACCESSIBILITY_SESSION} \\
\refconst{PMIX_STORAGE_ACCESSIBILITY_JOB} \\
\refconst{PMIX_STORAGE_ACCESSIBILITY_RACK} \\
\refconst{PMIX_STORAGE_ACCESSIBILITY_CLUSTER} \\
\refconst{PMIX_STORAGE_ACCESSIBILITY_REMOTE} \\
\refconst{PMIX_STORAGE_PERSISTENCE_TEMPORARY} \\
\refconst{PMIX_STORAGE_PERSISTENCE_NODE} \\
\refconst{PMIX_STORAGE_PERSISTENCE_SESSION} \\
\refconst{PMIX_STORAGE_PERSISTENCE_JOB} \\
\refconst{PMIX_STORAGE_PERSISTENCE_SCRATCH} \\
\refconst{PMIX_STORAGE_PERSISTENCE_PROJECT} \\
\refconst{PMIX_STORAGE_PERSISTENCE_ARCHIVE} \\
\refconst{PMIX_STORAGE_ACCESS_RD} \\
\refconst{PMIX_STORAGE_ACCESS_WR} \\
\refconst{PMIX_STORAGE_ACCESS_RDWR}

\subsection{Added Attributes (Provisional)}

\littleheader{Storage attributes}
\pasteAttributeItem{PMIX_STORAGE_ID}
\pasteAttributeItem{PMIX_STORAGE_PATH}
\pasteAttributeItem{PMIX_STORAGE_TYPE}
\pasteAttributeItem{PMIX_STORAGE_VERSION}
\pasteAttributeItem{PMIX_STORAGE_MEDIUM}
\pasteAttributeItem{PMIX_STORAGE_ACCESSIBILITY}
\pasteAttributeItem{PMIX_STORAGE_PERSISTENCE}
\pasteAttributeItem{PMIX_QUERY_STORAGE_LIST}
\pasteAttributeItem{PMIX_STORAGE_CAPACITY_LIMIT}
\pasteAttributeItem{PMIX_STORAGE_CAPACITY_USED}
\pasteAttributeItem{PMIX_STORAGE_OBJECT_LIMIT}
\pasteAttributeItem{PMIX_STORAGE_OBJECTS_USED}
\pasteAttributeItem{PMIX_STORAGE_MINIMAL_XFER_SIZE}
\pasteAttributeItem{PMIX_STORAGE_SUGGESTED_XFER_SIZE}
\pasteAttributeItem{PMIX_STORAGE_BW_MAX}
\pasteAttributeItem{PMIX_STORAGE_BW_CUR}
\pasteAttributeItem{PMIX_STORAGE_IOPS_MAX}
\pasteAttributeItem{PMIX_STORAGE_IOPS_CUR}
\pasteAttributeItem{PMIX_STORAGE_ACCESS_TYPE}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%