OK, recent migration from 980's to 6070's via volume snapmirror...
Volume deswizzling has been going on for over a week, pounding the disks at 90-100% utilization (via `sysstat` and `statit`).
WHEN WILL IT END?
How does one read the `wafl scan status` line for deswizzling? What are the stages, in what order do they run (if any), do they wrap around/interleave/etc., do they restart, at what priority do they run, etc.
The performance degradation is noticed by our users and their patience is growing thin with us (toaster admins).
Volume XXXX: Scan id Type of scan progress 6 active bitmap rearrangement fbn 7371 of 8031 w/ max_chain_len 3 8 volume deswizzling snap 199, inode 16868061 of 32767980. level 1 of normal files. Totals: Normal files: L1:26855/410365 L2:180/443302 L3:0/0 L4:0/0 Inode file: L0:380850/380850 L1:9114/183447 L2:24/378538 L3:4/4 L4:0/0 17149 container block reclamation block 4038 of 8031
Volume XXXX: Scan id Type of scan progress 9 active bitmap rearrangement fbn 9418 of 10708 w/ max_chain_len 3 11 volume deswizzling snap 127, inode 9300060 of 33554409. level 1 of normal files. Totals: Normal files: L1:17269/7 81866 L2:280/395806 L3:0/0 L4:0/0 Inode file: L0:1716623/1716623 L1:15840/401803 L2:42/831474 L3:6/6 L4:0/0 17151 container block reclamation block 4719 of 10708
Volume XXXX: Scan id Type of scan progress 12 active bitmap rearrangement fbn 3328 of 5265 w/ max_chain_len 3 14 volume deswizzling snap 32, inode 8724072 of 21481236. level 1 of normal files. Totals: Normal files: L1:31430/39 5230 L2:283/317204 L3:0/6 L4:0/0 Inode file: L0:1406225/1406225 L1:11461/183840 L2:24/370753 L3:6/6 L4:0/0 17141 container block reclamation block 2818 of 5265
Until next time...
The MathWorks, Inc. 508-647-7000 x7792 3 Apple Hill Drive, Natick, MA 01760-2098 508-647-7001 FAX tmerrill@mathworks.com http://www.mathworks.com ---