Bug #1629
AVS 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
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
History
Updated by Peter Tribble 12 months ago
Updated by - Status changed from New to Closed
avs has been removed from illumos