Re: Improving Performance with more OSD's?

[Lindsay Mathieson <lindsay.mathieson@xxxxxxxxx>]

Well I upgraded my cluster over the weekend :)

To each node I added:

- Intel SSD 530 for journals

- 2 * 1TB WD Blue

So two OSD Nodes had:

- Samsung 840 EVO SSD for Op. Sys.

- Intel 530 SSD for Journals (10GB Per OSD)

- 3TB WD Red

- 1 TB WD Blue

- 1 TB WD Blue

- Each disk weighted at 1.0

- Primary affinity of the WD Red (slow) set to 0

Took about 8 hours for 1TB of data to rebalance over the OSD's

Very pleased with results so far.

rados benchmark:

- Write bandwidth has increased from 49 MB/s to 140 MB/s

- Reads have stayed roughly the same at 500 MB/s

VM Benchmarks:

- Actually have stayed much the same, but have more "depth" - multiple VM's share the bandwidth nicely.

Users are finding their VM's *much* less laggy.

Thanks for all the help and suggestions.

Lindsay

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