We have a large JIRA hosted on prem with over 1 million issues. We had lot of performance issues in the past, as a result, one of our consultants suggested we go with SSD as ramdisk to store index. Ever since then our JIRA performance is drastically improved. One of the challenges that I still need help with is on index backup on restoration.
If we reboot the server, we will end up losing the index that is stored on the RAMDISK, as a result, we will have to go through a production downtime of 3 or more hours to lock and reindex.
Can anyone please tell me if you have a similar config. Also let me know how can we perform a quick backup of index to another drive so that in the event of server reboot, we can copy the index from a backup location. Any help in this regard is highly appreciated.
This is a bit confused - an SSD is not a RAM disk. An SSD is a solid state drive which retains data written to it when powered off. A RAM disk is a disk held in volatile RAM which loses all its data when it loses power.
RAM disks are by far the fastest option for a JIRA index, but because they're volatile, you have to rebuild the index on every reboot.
SSDs are slower than RAM disks, but still a lot faster than standard hard drives. If the three hour rebuild is an issue, a good option is to move off the RAM disk and onto a local SSD. Reboots will not lose the index then.
Your last suggestion is also valid if you want to continue to use a RAM disk. On an orderly shut down, stop JIRA, copy the whole index directory to a non-volatile storage (hard disk or even an SSD if you want), then, after reboot, when the RAM disk is available, copy it back. This is faster than re-indexing, but still may not be as fast to restore as using a normal disk or an SSD
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