[gpfsug-discuss] Clarification about blocksize in stardanrd gpfs and GNR
Dorigo Alvise (PSI)
alvise.dorigo at psi.ch
Thu Mar 21 13:22:45 GMT 2019
Hi,
I'm a little bit puzzled about different meanings of blocksize for different GPFS installation (standard and gnr).
>From this page https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/General%20Parallel%20File%20System%20(GPFS)/page/File%20System%20Planning
I read:
* The blocksize is the largest size IO that GPFS can issue to the underlying device
* A subblock is 1/32nd of blocksize. This is the smallest allocation to a single file
For non-gnr GPFS device is quite clear to me (I hope): it is a single spinning disk (or ssd). And I verified this on a small cluster composed of nsd using their local hard drive.
Can someone explain what is the "device" in the case of GNR ? a single pdisk ?
Thanks,
Alvise
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20190321/44e55f3f/attachment-0001.htm>
More information about the gpfsug-discuss
mailing list