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--></style></head><body lang=en-CH link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>Hello,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>A policy run with ‘-I defer’ and a placement rule did almost double the metadata usage of a filesystem. This filled the metadata disks to a critical level. I would like to understand if this is to be expected and ‘as designed’ or if I face some issue or bug. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> I hope a subsequent run of ‘mmrstripefs -p’ will reduce the metadata usage again.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Thank you<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I want to move all data to a new storage pool and did run a policy like<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US>RULE 'migrate_to_Data'<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US> MIGRATE<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US> WEIGHT(0)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> TO POOL 'Data'<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US> for each fileset with <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US> mmapplypolicy -I defer<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Next I want to actually move the data with <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US> mmrestripefs -p<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>After the policy run metadata usage increased from 2.06TiB to 3.53TiB and filled the available metadata space by >90%. This is somewhat surprising. Will the following run of ‘mmrestripefs -p’ reduce the usage again, when the files are not illplaced any more? The number of used Inodes did not change noticeably during the policy run. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Or maybe illplaced files use larger inodes? Looks like for each used inode we increased by about 4k: 400M inodes, 1.6T increase in size<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Thank you,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Heiner<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Some details<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US># mmlsfs fsxxxx -f -i -B -I -m -M -r -R -V<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US>flag value description<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US>------------------- ------------------------ -----------------------------------<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US> -f 8192 Minimum fragment (subblock) size in bytes (system pool)<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US> 32768 Minimum fragment (subblock) size in bytes (other pools)<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US> -i 4096 Inode size in bytes<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US> -B 1048576 Block size (system pool)<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US> 4194304 Block size (other pools)<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US> -I 32768 Indirect block size in bytes<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US> -m 1 Default number of metadata replicas<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US> -M 2 Maximum number of metadata replicas<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US> -r 1 Default number of data replicas<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US> -R 2 Maximum number of data replicas<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US> -V 23.00 (5.0.5.0) Current file system version<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> 19.01 (5.0.1.0) Original file system version<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US>Inode Information<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US>-----------------<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US>Total number of used inodes in all Inode spaces: 398502837<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US>Total number of free inodes in all Inode spaces: 94184267<o:p></o:p></span></p><p class=MsoNormal style='margin-left:11.1pt'><span lang=EN-US>Total number of allocated inodes in all Inode spaces: 492687104<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Total of Maximum number of inodes in all Inode spaces: 916122880<o:p></o:p></span></p></blockquote></div></div></body></html>