Hi Jochen, in enteprise environments you don´t use SAN for network mounted drives - they become the sole disk infracstructure for your virtual appliances run on (with fibrechannel in our case or iSCSI or FCoE in other cases). The i/o usually feels and acts like local disk mounted volumes. The virtual machines themselves don´t even know "where" sda or C: comes from. Suffice to say that I encountered a clear perfomance gap with a RAM-drive as well (journal folder was in a tmpfs volume). Just today I solved my issues permanently and will write a follow up asap :)
Am Donnerstag, 5. Januar 2017 15:37:15 UTC+1 schrieb Jochen Schalanda: > > Hi Jerri, > > On Thursday, 5 January 2017 14:34:08 UTC+1, Jerri Son wrote: >> >> of that I am aware, alas, a SAN usually provides storage for a virtual >> infrastructure and as such acts as a "local" drive :) >> > > The disk journal implementation makes heavy use of the disk > (write-through) cache to retain a high performance. When using a network > mounted drive to store the journal, this isn't possible which leads to a > severe performance impact. > > Cheers, > Jochen > -- You received this message because you are subscribed to the Google Groups "Graylog Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/graylog2/922f876b-e7b4-4ecd-95e3-eeeb35d98dfa%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
