View compaction keep failing because of not enough disk space

Couchbase Server
1

I am trying to compact my views in order to get some more disk space.
However, 1 of 3 nodes keeps failing view compaction because of disk space available.

Cannot compact view my_bucket/_design/my_view/main: the estimated necessary disk space is about 84220756300 bytes but the currently available disk space is 66556180480 bytes.

Compaction is successfully done for the other 2 nodes. How could I solve this issue? Could I never be able to compact that node?
How much disk space should I leave available in order to avoid such issue in the future? Any calculation for necessary disk space for compaction?

FYI,
Couchbase Server: CE 3.0.1
Number of nodes: 3
For each node,
CPU: 4
Memory: 30GB
Disk space: 300GB

Thank you for your time to respond.

2

Hi,

I’m sorry that you ran into this issue but sizing is a challenging task :slight_smile:

Because CB uses append only storage engine, there’s disk overhead regarding fragmentation and write amplification.

This blog is a great resource to go over some of the consideration for sizing:
http://blog.couchbase.com/how-many-nodes-part-1-introduction-sizing-couchbase-server-20-cluster

Thanks,
Qi

3

Does this mean I can get that node to compact the view unless I, for example, add more servers to the cluster?

4

Yes, either add more disk space or add new server will fix the problem.

Thanks,
Qi

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