Hello
Thanks for your reply…
Just to clear.. currently no load, nothing running on ceph… the fit test was
done on a fresh installed vm to have a fit test output for reference before
deploying any further vms..
Below is the bench result, yes its replicated pool…
# rados bench -p vms-os-r3-images 30 write -t 32 -b 1M
hints = 1
Maintaining 32 concurrent writes of 1048576 bytes to objects of size 1048576
for up to 30 seconds or 0 objects
Object prefix: benchmark_data_host08n.van2.netskr_995764
sec Cur ops started finished avg MB/s cur MB/s last lat(s) avg lat(s)
0 0 0 0 0 0 - 0
1 32 1376 1344 1343.81 1344 0.0125439 0.0235756
2 32 2985 2953 1476.31 1609 0.0153368 0.0215803
3 32 4545 4513 1504.15 1560 0.0176087 0.0211638
4 32 6151 6119 1529.57 1606 0.013467 0.0208516
5 32 7749 7717 1543.22 1598 0.0229487 0.0206937
6 32 9323 9291 1548.32 1574 0.0218796 0.0206146
7 32 10937 10905 1557.67 1614 0.0247086 0.0205051
8 32 12556 12524 1565.3 1619 0.0174251 0.0204056
9 32 14157 14125 1569.24 1601 0.0142258 0.0203625
10 32 15736 15704 1570.2 1579 0.019351 0.0203552
11 32 17286 17254 1568.34 1550 0.0197798 0.0203718
12 32 18715 18683 1556.71 1429 0.0241973 0.0205236
13 32 20255 20223 1555.41 1540 0.0226729 0.0205478
14 32 21849 21817 1558.15 1594 0.0372476 0.0205132
15 32 23458 23426 1561.52 1609 0.0238018 0.0204644
16 32 25078 25046 1565.16 1620 0.0183276 0.0204308
17 32 26676 26644 1567.08 1598 0.0198966 0.0204023
18 32 28286 28254 1569.46 1610 0.0121277 0.0203729
19 32 29864 29832 1569.9 1578 0.0213983 0.0203617
2025-07-24T18:05:45.399110+0000 min lat: 0.00366107 max lat: 0.220254 avg lat:
0.0203759
sec Cur ops started finished avg MB/s cur MB/s last lat(s) avg lat(s)
20 31 31423 31392 1569.39 1560 0.0165359 0.0203759
21 32 33027 32995 1570.98 1603 0.00897043 0.02035
22 32 34607 34575 1571.38 1580 0.0188498 0.0203498
23 32 36195 36163 1572.1 1588 0.00892525 0.0203346
24 32 37782 37750 1572.71 1587 0.012956 0.020331
25 32 39404 39372 1574.67 1622 0.0168824 0.0203063
26 32 41011 40979 1575.91 1607 0.0177068 0.0202896
27 32 42599 42567 1576.27 1588 0.0196947 0.0202878
28 32 44194 44162 1576.93 1595 0.0179365 0.020279
29 32 45752 45720 1576.27 1558 0.0256928 0.0202886
30 18 47359 47341 1577.75 1621 0.0159732 0.0202704
Total time run: 30.0114
Total writes made: 47359
Write size: 1048576
Object size: 1048576
Bandwidth (MB/sec): 1578.03
Stddev Bandwidth: 57.5748
Max bandwidth (MB/sec): 1622
Min bandwidth (MB/sec): 1344
Average IOPS: 1578
Stddev IOPS: 57.5748
Max IOPS: 1622
Min IOPS: 1344
Average Latency(s): 0.0202697
Stddev Latency(s): 0.00834519
Max latency(s): 0.234282
Min latency(s): 0.00366107
Cleaning up (deleting benchmark objects)
Removed 47359 objects
Clean up completed and total clean up time :2.91541
Regards
Dev
> On Jul 23, 2025, at 4:40 PM, Jean-Charles Lopez <jelo...@redhat.com> wrote:
>
> it comes to latency and performance for flash based Cep
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