Apparently, a small mistake in that developer works post. I always advise testing of new features on a scratchable system... Here's what I see on my test system:
#mmcrfs mak -F /vds/mn.nsd -A no -T /mak -B 16M -f 1K -i 1K Value '1024' for option '-f' is out of range. Valid values are 4096 through 524288. # mmcrfs mak -F /vds/mn.nsd -A no -T /mak -B 16M -f 4K -i 1K (runs okay) # mmlsfs mak flag value description ------------------- ------------------------ ----------------------------------- -f 4096 Minimum fragment (subblock) size in bytes -i 1024 Inode size in bytes -I 32768 Indirect block size in bytes ... -B 16777216 Block size ... -V 18.00 (5.0.0.0) File system version ... --subblocks-per-full-block 4096 Number of subblocks per full block ... From: [email protected] To: gpfsug main discussion list <[email protected]> Date: 03/30/2018 12:21 PM Subject: [gpfsug-discuss] sublocks per block in GPFS 5.0 Sent by: [email protected] Hello Everyone, I am a little bit confused with the number of sub-blocks per block-size of 16M in GPFS 5.0. In the below documentation, it mentions that the number of sub-blocks per block is 16K, but "only for Spectrum Scale RAID" https://developer.ibm.com/storage/2018/01/11/spectrum-scale-variant-sub-blocks/ However, when i created the filesystem “without” spectrum scale RAID. I still see that the number of sub-blocks per block is 1024. mmlsfs <filesystem> --subblocks-per-full-block flag value description ------------------- ------------------------ ----------------------------------- --subblocks-per-full-block 1024 Number of subblocks per full block So May i know if the sub-blocks per block-size really 16K? or am i missing something? Regards, Lohit_______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at spectrumscale.org https://urldefense.proofpoint.com/v2/url?u=http-3A__gpfsug.org_mailman_listinfo_gpfsug-2Ddiscuss&d=DwICAg&c=jf_iaSHvJObTbx-siA1ZOg&r=cvpnBBH0j41aQy0RPiG2xRL_M8mTc1izuQD3_PmtjZ8&m=HNrrMTazEN37eiIyxj9LWFMt2v1vCWeYuAGeHXXgIN8&s=Q6RUpDte4cePcCa_VU9ClyOvHMwhOWg8H1sRVLv9ocU&e=
_______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at spectrumscale.org http://gpfsug.org/mailman/listinfo/gpfsug-discuss
