Thank you Dima, Updates are highly multi-threaded batch processes at any time. We won't have all index in RAM cache Disks are SSD
Dominique Le ven. 7 oct. 2022 à 00:28, dmitri maziuk <dmitri.maz...@gmail.com> a écrit : > On 2022-10-06 4:54 PM, Dominique Bejean wrote: > > > Storage configuration is the second point that I would like to > investigate > > in order to better share disk resources. > > Instead have one single RAID 6 volume, isn't it better to have one > distinct > > not RAID volume per Solr node (if multiple Solr nodes are running on the > > server) or multiple not RAID volumes use by a single Solr JVM (if only > one > > Solr node is running on the server) ? > > The best option is to have the indexes in RAM cache. The 2nd best option > is the 2-level cache w/ RAM + SSD -- that's what you get with ZFS, and > you can use the cheaper HDDs for primary storage. The next one is all > SSDs -- in that case RAID-1(0) may give you better read performance than > a dedicated drive, but probably not enough to notice. There's very > little point in going RAID-5 or 6 on SSDs. > > In terms of performance RAID5/6 on HDDs is likely the worst option, and > a single RAID6 volume is also the works option in terms of flexibility > and maintenance. If your customer doesn't have money to fill those slots > with SSDs, I'd probably go with one small SSD for system + swap, a > 4-disk RAID-10, and a hot spare for it. > > Dima > >
