Hi, We know one serious source of slowdown when backups are enabled. See [1] and [2]. It will be fixed in 2.4.
Vladimir. [1] https://issues.apache.org/jira/browse/IGNITE-6624 [2] https://issues.apache.org/jira/browse/IGNITE-6626 On Thu, Oct 19, 2017 at 9:29 PM, blackfield <[email protected]> wrote: > Here, I am trying to ascertain that I set backup == 2 properly as I > mentioned > above that I do not see query performance difference between backup ==1 and > backup == 2. > > I want to make sure that I configure my cache properly. > > When I set the backup==2 (to have three copies), I notice the following via > visor. > > The Affinity Backups is still equal to 1. Is this a different property than > number of backups? If it is not, how do one see the number of backups a > cache is configured for? > > Invoking "cache -a" to see the detail cache stat, with backup==2, under the > size column, the sum of entries on all nodes is equal to the number of rows > in the table * 2. It appears this is the case for backup >= 1? > > As in, only one set of backup will be stored in off heap regardless the > number of backups are specified? > > > > > -- > Sent from: http://apache-ignite-users.70518.x6.nabble.com/ >
