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Bug #1629
closedAVS slows down writes on a primary host
Status:
Closed
Priority:
Low
Assignee:
-
Category:
-
Start date:
2011-10-12
Due date:
% Done:
0%
Estimated time:
Difficulty:
Tags:
needs-triage
Gerrit CR:
Description
Not sure if this is a bug or feature report :)
I'm playing with AVS remote mirror on oi_151a and it seems enabling replication slows down writes on a primary host.
sndradm -d host1 /dev/zvol/rdsk/data/avs03 /dev/zvol/rdsk/data/bitmap03 host2 /dev/zvol/rdsk/data/avs03 /dev/zvol/rdsk/data/bitmap03 ip async Disable Remote Mirror? (Y/N) [N]: y dd if=/dev/zero of=/dev/zvol/rdsk/data/avs03 bs=1024k count=100100+0 records in 100+0 records out 104857600 bytes (105 MB) copied, 2.48679 s, 42.2 MB/s sndradm -E host1 /dev/zvol/rdsk/data/avs03 /dev/zvol/rdsk/data/bitmap03 host2 /dev/zvol/rdsk/data/avs03 /dev/zvol/rdsk/data/bitmap03 ip async Enable Remote Mirror? (Y/N) [N]: y dd if=/dev/zero of=/dev/zvol/rdsk/data/avs03 bs=1024k count=1010+0 records in 10+0 records out 10485760 bytes (10 MB) copied, 3.53222 s, 3.0 MB/s # kstat sndr:2:setinfo module: sndr instance: 2 name: setinfo class: storedge async_block_hwm 15829 async_item_hwm 147 async_queue_blocks 0 async_queue_items 0 async_queue_type memory async_throttle_delay 186 autosync 0 bitmap /dev/zvol/rdsk/data/bitmap03 bitsset 0 bmp_size 204800 bmpflags 0 crtime 74092.363886499 disk_status 0 flags 2054 if_down 0 if_rpc_version 7 maxqfbas 65536 maxqitems 4096 primary_host hosting-backup1.dc2 primary_vol /dev/zvol/rdsk/data/avs03 secondary_host cache01.dc2 secondary_vol /dev/zvol/rdsk/data/avs03 snaptime 80400.684160156 syncflags 0 syncpos 40960 type_flag 5 volsize 104857600 /dev/zvol/rdsk/data/avs03 -> host2:/dev/zvol/rdsk/data/avs03 autosync: off, max q writes: 4096, max q fbas: 65536, async threads: 100, mode: async, state: replicating $ iostat -xenz 1 3 extended device statistics ---- errors --- r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b s/w h/w trn tot device 0.0 4.9 0.0 2.6 0.0 0.0 0.0 8.0 0 4 0 0 0 0 gsdbc 0.1 1.9 1.4 20.2 0.0 0.0 0.0 1.2 0 0 0 0 0 0 c2t50014EE65678F920d0 0.0 5.3 0.2 79.0 0.0 0.0 0.0 0.7 0 0 0 0 0 0 c2t50014EE0AD63C521d0 0.0 5.2 0.2 77.7 0.0 0.0 0.0 0.7 0 0 0 0 0 0 c2t50014EE0AD6407B2d0 0.0 5.3 0.2 77.7 0.0 0.0 0.0 0.7 0 0 0 0 0 0 c2t50014EE0AD642753d0 0.0 5.3 0.2 77.2 0.0 0.0 0.0 0.7 0 0 0 0 0 0 c2t50014EE0AD640F36d0 0.1 1.9 1.5 20.2 0.0 0.0 0.0 1.2 0 0 0 0 0 0 c2t50014EE65678F31Cd0 0.0 5.3 0.2 79.0 0.0 0.0 0.0 0.7 0 0 0 0 0 0 c2t50014EE0AD79B77Cd0 0.0 5.2 0.2 77.2 0.0 0.0 0.0 0.7 0 0 0 0 0 0 c2t50014EE0AD640AFDd0 0.0 1.2 0.0 0.7 0.0 0.0 0.0 7.7 0 1 0 0 0 0 sdbc0 0.0 19.3 0.0 9.8 0.0 0.2 0.0 8.2 0 16 0 0 0 0 sdbc1 0.0 2.0 0.0 1.2 0.0 0.0 0.0 9.1 0 2 0 0 0 0 sdbc2 1.0 0.1 32.6 1.5 0.0 0.0 0.0 4.3 0 0 0 0 0 0 sndr0 0.0 18.9 0.0 483.7 0.1 0.1 4.3 5.9 1 10 0 0 0 0 sndr1 0.0 2.0 0.0 54.7 0.1 0.0 52.3 5.4 0 1 0 0 0 0 sndr2 0.0 1.2 0.0 0.7 0.0 0.0 0.0 7.7 0 1 0 0 0 0 sndrbmp0 0.0 19.3 0.0 9.8 0.0 0.2 0.0 8.2 0 16 0 0 0 0 sndrbmp1 0.0 2.0 0.0 1.2 0.0 0.0 0.0 9.1 0 2 0 0 0 0 sndrbmp2 extended device statistics ---- errors --- r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b s/w h/w trn tot device 0.0 88.9 0.0 44.4 0.0 0.8 0.0 9.4 0 83 0 0 0 0 gsdbc 8.0 90.9 1022.8 986.9 0.0 0.0 0.0 0.3 0 3 0 0 0 0 c2t50014EE0AD63C521d0 4.0 90.9 511.4 930.9 0.0 0.0 0.0 0.2 0 2 0 0 0 0 c2t50014EE0AD6407B2d0 1.0 90.9 1.5 930.9 0.0 0.0 0.0 0.3 0 3 0 0 0 0 c2t50014EE0AD642753d0 8.0 88.9 1022.8 927.0 0.0 0.0 0.0 0.4 0 3 0 0 0 0 c2t50014EE0AD640F36d0 0.0 91.9 0.0 986.9 0.0 0.0 0.0 0.1 0 1 0 0 0 0 c2t50014EE0AD79B77Cd0 0.0 88.9 0.0 927.0 0.0 0.0 0.0 0.1 0 1 0 0 0 0 c2t50014EE0AD640AFDd0 0.0 88.9 0.0 44.4 0.0 0.8 0.0 9.4 0 83 0 0 0 0 sdbc2 0.0 88.9 0.0 2458.7 0.0 0.4 0.0 4.2 0 38 0 0 0 0 sndr2 0.0 89.9 0.0 44.9 0.0 0.8 0.0 9.3 0 83 0 0 0 0 sndrbmp2 extended device statistics ---- errors --- r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b s/w h/w trn tot device 0.0 87.0 0.0 43.5 0.0 0.8 0.0 9.6 0 84 0 0 0 0 gsdbc 5.0 87.0 639.9 871.8 0.0 0.0 0.0 0.1 0 1 0 0 0 0 c2t50014EE0AD63C521d0 2.0 88.0 256.0 927.8 0.0 0.0 0.0 0.1 0 1 0 0 0 0 c2t50014EE0AD6407B2d0 3.0 88.0 383.9 927.8 0.0 0.0 0.0 0.3 0 3 0 0 0 0 c2t50014EE0AD642753d0 1.0 88.0 128.0 955.8 0.0 0.0 0.0 0.4 0 3 0 0 0 0 c2t50014EE0AD640F36d0 3.0 86.0 383.9 871.8 0.0 0.0 0.0 0.2 0 2 0 0 0 0 c2t50014EE0AD79B77Cd0 4.0 88.0 511.9 955.8 0.0 0.0 0.0 0.3 0 3 0 0 0 0 c2t50014EE0AD640AFDd0 0.0 87.0 0.0 43.5 0.0 0.8 0.0 9.6 0 84 0 0 0 0 sdbc2 0.0 87.0 0.0 2412.5 0.0 0.4 0.0 4.2 0 36 0 0 0 0 sndr2 0.0 87.0 0.0 43.5 0.0 0.8 0.0 9.6 0 84 0 0 0 0 sndrbmp2
Updated by Peter Tribble almost 4 years ago
- Status changed from New to Closed
avs has been removed from illumos
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