[gpfsug-discuss] FYI - Spectrum Scale 5.0.2 Available
Oesterlin, Robert
Robert.Oesterlin at nuance.com
Fri Sep 14 20:36:57 BST 2018
I did not see this on Fix Central yet (I’m assuming you can upgrade from 5.0.1,X) , but it is on Passport Advantage. Looks like a nice set of changes, which is summarized here:
https://www.ibm.com/support/knowledgecenter/STXKQY_5.0.2/com.ibm.spectrum.scale.v5r02.doc/bl1xx_soc.htm
Here are few highlights I think are worth noting (not all of them) – I beta tested watch folders and It’s a great addition to Scale.
File system core improvements
* Combined gpfs.base and gpfs.ext into a single package on Linux
* File system maintenance mode provides a safe access window for file system maintenance
* The maxActiveIallocSegs attribute improves the performance of deletes and unlinks
* The mmnetverify command checks the connectivity of remote clusters
* The GPFS portability layer (GPL) can be rebuilt automatically
* You can now configure a cluster to automatically rebuild the GPL whenever a new level of the Linux kernel is installed or whenever a new level of IBM Spectrum Scale is installed. For more information, see the description of the autoBuildGPL attribute in the topic mmchconfig command<https://www.ibm.com/support/knowledgecenter/STXKQY_5.0.2/com.ibm.spectrum.scale.v5r02.doc/bl1adm_mmchconfig.htm?view=kc>.
* Two features cope with long I/O waits on directly attached disks
* The diskIOHang callback event allows you to add notification and data collection scripts to analyze the cause of a local I/O request that has been pending in the node kernel for more than 5 minutes. For more information, see mmaddcallback command<https://www.ibm.com/support/knowledgecenter/STXKQY_5.0.2/com.ibm.spectrum.scale.v5r02.doc/bl1adm_mmaddcallback.htm?view=kc>.
* The panicOnIOHang attribute controls whether the GPFS daemon panics the node kernel when a local I/O request has been pending in the kernel for more than five minutes. For more information, see mmchconfig command<https://www.ibm.com/support/knowledgecenter/STXKQY_5.0.2/com.ibm.spectrum.scale.v5r02.doc/bl1adm_mmchconfig.htm?view=kc>.
Watch folder
Watch folder is a flexible API that allows programmatic actions to be taken based on file system events. For more information, see Introduction to watch folder<https://www.ibm.com/support/knowledgecenter/STXKQY_5.0.2/com.ibm.spectrum.scale.v5r02.doc/bl1ins_wfintro.htm?view=kc#watchintro>. It has the following features:
* Watch folder can be run against folders, filesets, and inode spaces.
* Watch folder is modeled after Linux inotify, but works with clustered file systems and supports recursive watches for filesets and inode spaces.
* Watch folder has two primary components:
o The GPFS programming interfaces, which are included within <gpfs_watch.h>. For more information, see Watch folder API<https://www.ibm.com/support/knowledgecenter/STXKQY_5.0.2/com.ibm.spectrum.scale.v5r02.doc/bl1adm_watchfolderapi.htm?view=kc#watchfolderapi>.
o The mmwatch command, which provides information for all of the watches running within a cluster. For more information, see mmwatch command<https://www.ibm.com/support/knowledgecenter/STXKQY_5.0.2/com.ibm.spectrum.scale.v5r02.doc/bl1adm_mmwatch.htm?view=kc#mmwatch>.
* A watch folder application uses the API to run on a node within an IBM Spectrum Scale cluster.
o It utilizes the message queue to receive events from multiple nodes and consume from the node that is running the application.
o Lightweight events come in from all eligible nodes within a cluster and from accessing clusters.
* Watch folder is integrated into call home, IBM Spectrum Scale snap log collection, and IBM Spectrum Scale trace.
Bob Oesterlin
Sr Principal Storage Engineer, Nuance
507-269-0413
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20180914/4e296930/attachment.htm>
More information about the gpfsug-discuss
mailing list