To keep this great chain going: If my metadata is on FLASH, would having a smaller blocksize for the system pool (metadata only) be helpful.
My filesystem blocksize is 8MB On Fri, Sep 23, 2016 at 6:34 PM, Stef Coene <stef.co...@docum.org> wrote: > On 09/22/2016 08:36 PM, Stef Coene wrote: > >> Hi, >> >> Is it needed to specify a different blocksize for the system pool that >> holds the metadata? >> >> IBM recommends a 1 MB blocksize for the file system. >> But I wonder a smaller blocksize (256 KB or so) for metadata is a good >> idea or not... >> > I have read the replies and at the end, this is what we will do: > Since the back-end storage will be V5000 with a default stripe size of > 256KB and we use 8 data disk in an array, this means that 256KB * 8 = 2M is > the best choice for block size. > So 2 MB block size for data is the best choice. > > Since the block size for metadata is not that important in the latest > releases, we will also go for 2 MB block size for metadata. > > Inode size will be left at the default: 4 KB. > > > > Stef > _______________________________________________ > gpfsug-discuss mailing list > gpfsug-discuss at spectrumscale.org > http://gpfsug.org/mailman/listinfo/gpfsug-discuss >
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