Hi Upayavira, best would be to have 4 dedicated servers, 2 for indexing (masters) and 2 for searching (slaves). Always one is online and one is standby in case of hardware failure or update of OS, JAVA or even SOLR.
But I only get 256GB RAM machines with many CPUs which I have to share with other project partners. Such a machine as dedicated SOLR server would be oversized for a single index SOLR system. Currently 64GB RAM machines are sufficient. You think docker could do this? Regards Bernd Am 01.10.2015 um 09:29 schrieb Upayavira: > What are you trying to achieve by using virtualisation? > > If it is just code separation, consider using containers and Docker > rather than fully fledged VMs. > > CPU is shared, but each container sees its own view of its file system. > > Upayavira > > On Thu, Oct 1, 2015, at 07:47 AM, Bernd Fehling wrote: >> Hi Shawn, >> >> unfortunately we have to run VMs, otherwise we would waste hardware. >> I thought other solr users are in the same situation but seams that >> other users have tons of hardware available and we are the only one >> having to use VMs. >> Right, bare metal is always better than any VM. >> As you mentioned we have the indexer (master) on one physical machine >> and two searchers (slaves) on other physical machines, all together with >> other little VMs which are not I/O and CPU heavy. >> >> Regards >> Bernd >> >> Am 30.09.2015 um 18:48 schrieb Shawn Heisey: >>> On 9/30/2015 3:12 AM, Bernd Fehling wrote: >>>> while setting up some new servers (virtual machines) using XEN I was >>>> thinking about an alternative like KVM. My last tests with KVM is >>>> a while ago and XEN performed much better in the area of I/O and >>>> CPU usage. >>>> This lead me to the idea to start a poll about virtualization platform and >>>> your experiences. >>> >>> I once had a virtualized Solr install with Xen where each VM housed one >>> Solr instance with one core. The index was distributed, so it required >>> several VMs for one copy of the index. >>> >>> I eliminated the virtualization, used the same hardware as bare metal >>> with Linux, still one Solr instance installed on the machine, but with >>> multiple Solr cores. Performance is much better now. >>> >>> General advice: Don't run virtual machines. >>> >>> If a virtual environment is the only significant hardware you have >>> access to and it's used for more than Solr, then you might need to. If >>> you do run virtual, then minimize the number of VMs, don't put multiple >>> replicas of the same index data on the same physical VM host, give each >>> Solr VM lots of memory, and don't oversubscribe the memory/cpu on the >>> physical VM host. >>> >>> Thanks, >>> Shawn >>> -- ************************************************************* Bernd Fehling Bielefeld University Library Dipl.-Inform. (FH) LibTec - Library Technology Universitätsstr. 25 and Knowledge Management 33615 Bielefeld Tel. +49 521 106-4060 bernd.fehling(at)uni-bielefeld.de BASE - Bielefeld Academic Search Engine - www.base-search.net *************************************************************
