Hi Brian,
On 4/16/19 1:57 AM, Brian Topping wrote:
On Apr 15, 2019, at 5:18 PM, Brian Topping <brian.topping@xxxxxxxxx
<mailto:brian.topping@xxxxxxxxx>> wrote:
If I am correct, how do I trigger the full sync?
Apologies for the noise on this thread. I came to discover the
`radosgw-admin [meta]data sync init` command. That’s gotten me with
something that looked like this for several hours:
[root@master ~]# radosgw-admin sync status
realm 54bb8477-f221-429a-bbf0-76678c767b5f (example)
zonegroup 8e33f5e9-02c8-4ab8-a0ab-c6a37c2bcf07 (us)
zone b6e32bc8-f07e-4971-b825-299b5181a5f0 (secondary)
metadata sync preparing for full sync
full sync: 64/64 shards
full sync: 0 entries to sync
incremental sync: 0/64 shards
metadata is behind on 64 shards
behind shards:
[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63]
data sync source: 35835cb0-4639-43f4-81fd-624d40c7dd6f (master)
preparing for full sync
full sync: 1/128 shards
full sync: 0 buckets to sync
incremental sync: 127/128 shards
data is behind on 1 shards
behind shards: [0]
I also had the data sync showing a list of “behind shards”, but both
of them sat in “preparing for full sync” for several hours, so I tried
`radosgw-admin [meta]data sync run`. My sense is that was a bad idea,
but neither of the commands seem to be documented and the thread I
found them on indicated they wouldn’t damage the source data.
QUESTIONS at this point:
1) What is the best sequence of commands to properly start the sync?
Does init just set things up and do nothing until a run is started?
The sync is always running. Each shard starts with full sync (where it
lists everything on the remote, and replicates each), then switches to
incremental sync (where it polls the replication logs for changes). The
'metadata sync init' command clears the sync status, but this isn't
synchronized with the metadata sync process running in radosgw(s) - so
the gateways need to restart before they'll see the new status and
restart the full sync. The same goes for 'data sync init'.
2) Are there commands I should run before that to clear out any
previous bad runs?
Just restart gateways, and you should see progress via 'sync status'.
*Thanks very kindly for any assistance. *As I didn’t really see any
documentation outside of setting up the realms/zones/groups, it seems
like this would be useful information for others that follow.
best, Brian
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