# ls -l home/ | grep ^d
drwx------. 5 jira jira 4096 Feb 13 2015 caches
drwx------. 4 jira jira 4096 Jul 1 2013 data
drwxr-xr-x. 3 jira jira 4096 Jul 27 16:03 export
drwx------. 4 jira jira 4096 Jun 10 2013 import
drwx------. 2 jira jira 4096 Oct 7 17:41 log
drwx------. 2 jira jira 4096 Jun 10 2013 logos
drwxr-xr-x. 3 jira jira 4096 Dec 19 2013 logs
drwx------. 2 jira jira 4096 Jun 10 2013 monitor
drwx------. 5 jira jira 4096 Jun 10 2013 plugins
drwx------. 3 jira jira 4096 Jun 10 2013 tmp
I found the document for Confluence with all the information https://confluence.atlassian.com/doc/confluence-home-and-other-important-directories-590259707.html, but did not find for JIRA.
I will be migrating our JIRA to AWS. Since AWS instance provides fast temporary storage (ephemeral disk), I am planning to mount all the directories which can be rebuilt on restart/re-index of JIRA on that. Like for confluence, the data in the following directories are regenerated on every Confluence restart/re-index. home/index home/plugins-osgi-cache home/thumbnails home/temp So the above directories are safe to mount on a destructible storage.
No. Of that list, only "thumbnails" is totally safe. There's a lot of data in the other three directories which is ok to lose or delete, but it has consequences. Deletion of plugins-osgi-cache and temp means longer startup times and potentially some odd behaviour in places (nothing fatal, but you might get complaints). But the big one is losing the index. If you put that on ephemeral storage, you are going to have to do a full re-index of JIRA on *every* restart. Before you do this, test it. Will your users accept a full re-index on restart? Remember on large JIRA systems, you are looking at *hours*, not seconds.
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