Deployment Architecture

Hot Buckets Replications

Ed_Alias
Path Finder

Hi,

we have a splunk cluster with :
-a master
-2 indexer
-a search head

we are planning maintenance updates etc ...

so i tested out high availability of our splunk cluster.

The facts are that i stoped an indexer for few hours to see how buckets will react.

The cluster reacts ok BUT i have an issue with a few hot buckets that are not replicated from the host that stayed up to the host that was Down.

I think that buckets wich were started without a peer node to start replication are not replicated.

I think they will get replication when they go warm.

Meaning in my configuration i have to force hot buckets to go warm so i can replicate them and meet my replication factor.

Is there a way to start replication of hotbucket ?

0 Karma

Ed_Alias
Path Finder

Well after putting down and then up (2 hours later) an indexing peer (lets call him SRVLOG2);

my cluster wasn't able to rebluid indexes and i couldn't reach my replication factor of 2.

I had to restart the other indexing peer (SRVLOG3) to get a few more buckets and finaly restart SRVLOG2 to get back to a fully operational cluster.

Obviously i have a bucket replication issue; i had the message :

Too many streaming errors to target=. Not rolling hot buckets on further errors to this target. (This condition might exist with other targets too. Please check the logs.)

http://docs.splunk.com/Documentation/Splunk/6.0/Indexer/Bucketreplicationissues

restarting the splunk service was the first solution i think off; but i think a lighter solution would be to move from hot to warm i'll try this solution soon.

Of course the best would be not to have to do nothing when a peer goes back on, bucket fixing operations from the master should do that job.

PS : thanks for your answer 😃

ben363
Path Finder

Are you seeing bucket errors in SRVLOG2/...var/log/splunk/splunk.d?

0 Karma

svasan_splunk
Splunk Employee
Splunk Employee

Ed_alias,

Hot buckets are replicated too. (The replication is not per-event but a certain slice of data.) See http://docs.splunk.com/Documentation/Splunk/6.0/Indexer/Howclusteredindexingworks for more information.

Could you elaborate on what exactly was the issue?

0 Karma
Get Updates on the Splunk Community!

What’s New in Splunk App for PCI Compliance 5.3.1?

The Splunk App for PCI Compliance allows customers to extend the power of their existing Splunk solution with ...

Extending Observability Content to Splunk Cloud

Register to join us !   In this Extending Observability Content to Splunk Cloud Tech Talk, you'll see how to ...

What's new in Splunk Cloud Platform 9.1.2312?

Hi Splunky people! We are excited to share the newest updates in Splunk Cloud Platform 9.1.2312! Analysts can ...