But even with XA log, am I correct in thinking that the writes themselves will be mostly sequential? Regards, Phil.
________________________________ From: Otis Gospodnetic [mailto:otis.gospodne...@gmail.com] Sent: Thu 20/09/2012 14:09 To: solr-user@lucene.apache.org Subject: Re: Solr Write workload Hi, Right, documents are buffered in jvm heap according to ramBufferSizeMB setting before getting indexed. But xa log doesn't do that I don't think. Otis -- Performance Monitoring - http://sematext.com/spm On Sep 20, 2012 8:11 AM, "John, Phil (CSS)" <philj...@capita.co.uk> wrote: > Hi, > > We're in the process of finalising the specification for our Solr cluster > and just wanted to double check something: > > What is the major IO/write workload type in Solr? > > From what I understand, the main workload appears to be largely sequential > appends to segments, rather than heavily biased towards random writes. > > Is that largely correct? > > The reason I'm asking is that we're looking at SSDs (primarily for read > performance), but by having them in a RAID array we will lose TRIM support, > which won't be as much of an issue if random writes are fairly low. > > Thanks, > > Phil. > > > This email and any attachment to it are confidential. Unless you are the > intended recipient, you may not use, copy or disclose either the message or > any information contained in the message. If you are not the intended > recipient, you should delete this email and notify the sender immediately. > > Any views or opinions expressed in this email are those of the sender > only, unless otherwise stated. All copyright in any Capita material in > this email is reserved. > > All emails, incoming and outgoing, may be recorded by Capita and monitored > for legitimate business purposes. > > Capita exclude all liability for any loss or damage arising or resulting > from the receipt, use or transmission of this email to the fullest extent > permitted by law. >
