Hi,
I'm seeing errors in Windows VM guests's event logs, for example:
The IO operation at logical block address 0x607bf7 for Disk 1 (PDO name
\Device\0000001e) was retried
Log Name: System
Source: Disk
Event ID: 153
Level: Warning
Initialising the disk to use GPT is successful but attempting to create a
standard NTFS volume eventually times out and fails.
Pretty sure this is in production in numerous environments, so I must be doing
something wrong... Could anyone please validate that a rbd cached erasure coded
image can be used as a Windows VM data disc?
Running Ceph Nautilus 14.2.4 with kernel 5.0.21
Created new erasure coded pool backed by spinners and a new replicated ssd pool
for metadata:
ceph osd erasure-code-profile set ec32_hdd \
plugin=jerasure k=3 m=2 technique=reed_sol_van \
crush-root=default crush-failure-domain=host crush-device-class=hdd \
directory=/usr/lib/ceph/erasure-code;
ceph osd pool create ec_hdd 64 erasure ec32_hdd;
ceph osd pool set ec_hdd allow_ec_overwrites true;
ceph osd pool application enable ec_hdd rbd;
ceph osd crush rule create-replicated replicated_ssd default host ssd;
ceph osd pool create rbd_ssd 64 64 replicated replicated_ssd;
ceph osd pool application enable rbd_ssd rbd;
rbd create rbd_ssd/surveylance-recordings --size 1T --data-pool ec_hdd;
Added a caching tier:
ceph osd pool create ec_hdd_cache 64 64 replicated replicated_ssd;
ceph osd tier add ec_hdd ec_hdd_cache;
ceph osd tier cache-mode ec_hdd_cache writeback;
ceph osd tier set-overlay ec_hdd ec_hdd_cache;
ceph osd pool set ec_hdd_cache hit_set_type bloom;
ceph osd pool set ec_hdd_cache hit_set_count 12
ceph osd pool set ec_hdd_cache hit_set_period 14400
ceph osd pool set ec_hdd_cache target_max_bytes $[128*1024*1024*1024]
ceph osd pool set ec_hdd_cache min_read_recency_for_promote 2
ceph osd pool set ec_hdd_cache min_write_recency_for_promote 2
ceph osd pool set ec_hdd_cache cache_target_dirty_ratio 0.4
ceph osd pool set ec_hdd_cache cache_target_dirty_high_ratio 0.6
ceph osd pool set ec_hdd_cache cache_target_full_ratio 0.8
Image appears to have been created correctly:
rbd ls rbd_ssd -l
NAME SIZE PARENT FMT PROT LOCK
surveylance-recordings 1 TiB 2
rbd info rbd_ssd/surveylance-recordings
rbd image 'surveylance-recordings':
size 1 TiB in 262144 objects
order 22 (4 MiB objects)
snapshot_count: 0
id: 7341cc54df71f
data_pool: ec_hdd
block_name_prefix: rbd_data.2.7341cc54df71f
format: 2
features: layering, data-pool
op_features:
flags:
create_timestamp: Sun Sep 22 17:47:30 2019
access_timestamp: Sun Sep 22 17:47:30 2019
modify_timestamp: Sun Sep 22 17:47:30 2019
Ceph appears healthy:
ceph -s
cluster:
id: 31f6ea46-12cb-47e8-a6f3-60fb6bbd1782
health: HEALTH_OK
services:
mon: 3 daemons, quorum kvm1a,kvm1b,kvm1c (age 5d)
mgr: kvm1c(active, since 5d), standbys: kvm1b, kvm1a
mds: cephfs:1 {0=kvm1c=up:active} 2 up:standby
osd: 24 osds: 24 up (since 4d), 24 in (since 4d)
data:
pools: 9 pools, 417 pgs
objects: 325.04k objects, 1.1 TiB
usage: 3.3 TiB used, 61 TiB / 64 TiB avail
pgs: 417 active+clean
io:
client: 25 KiB/s rd, 2.7 MiB/s wr, 17 op/s rd, 306 op/s wr
cache: 0 op/s promote
ceph df
RAW STORAGE:
CLASS SIZE AVAIL USED RAW USED %RAW USED
hdd 62 TiB 59 TiB 2.9 TiB 2.9 TiB 4.78
ssd 2.4 TiB 2.1 TiB 303 GiB 309 GiB 12.36
TOTAL 64 TiB 61 TiB 3.2 TiB 3.3 TiB 5.07
POOLS:
POOL ID STORED OBJECTS USED %USED
MAX AVAIL
rbd_hdd 1 995 GiB 289.54k 2.9 TiB 5.23
18 TiB
rbd_ssd 2 17 B 4 48 KiB 0
666 GiB
rbd_hdd_cache 3 99 GiB 34.91k 302 GiB 13.13
666 GiB
cephfs_data 4 2.1 GiB 526 6.4 GiB 0.01
18 TiB
cephfs_metadata 5 767 KiB 22 3.7 MiB 0
18 TiB
device_health_metrics 6 5.9 MiB 24 5.9 MiB 0
18 TiB
ec_hdd 10 4.0 MiB 3 7.5 MiB 0
32 TiB
ec_hdd_cache 11 67 MiB 30 200 MiB 0
666 GiB
Regards
David Herselman
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