On Mon, 2015-10-05 at 17:26 -0400, Siddhartha Singh Sandhu wrote: > Following up on that: Would having an SSD make considerable difference in > speed?
Yes, but only to a point. The UK Web Archive has done some tests on optimizing indexes on both spinning drives and SSDs: https://github.com/ukwa/shine/tree/master/python/test-logs With spinning drives, their machines maxed out on IOWait. With SSD, the machine maxed out on CPU. That might sound great, but the problem is that optimizing on a single shard is single threaded (at least for Solr 4.10.x), so if there is only a single shard on the machine, only 1 CPU is running at full tilt. There is always a bottleneck. What might help is that the SSD (probably) does not get bogged down by the process, so it should be much better at handling other requests while the optimization is running. - Toke Eskildsen, State and University Library, Denmark
