@ayende @gregyoung You want to make sure you're measuring storage disk queue not some file system queue is what I mean.
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Replying to @kellabyte
@kellabyte@ayende@gregyoung IOPs alone is an insufficient metric, as is queue depth. + Latency, then you know http://blog.richardelling.com/2012/03/iops-and-latency-are-not-related-hdd.html …2 replies 0 retweets 3 likes -
Replying to @DoeboizMyers
@doeboizmyers@ayende@gregyoung But if you're writing a database that wants to do any kind of decent TPS queue depth of 1 is going to suck3 replies 0 retweets 0 likes -
Replying to @kellabyte
@kellabyte@DoeboizMyers@gregyoung Problems with TPS is that transactions are inherently serial. Hard to do otherwise.1 reply 0 retweets 0 likes -
Replying to @ayende
@ayende@kellabyte@DoeboizMyers whats the issue with serial? Embrace it, love it cc@mjpt7771 reply 0 retweets 2 likes -
Replying to @gregyoung
@gregyoung@kellabyte@DoeboizMyers@mjpt777 How do you do parallel writes with serial tx?1 reply 0 retweets 0 likes -
Replying to @ayende
@ayende@kellabyte@DoeboizMyers@mjpt777 linearize them.3 replies 0 retweets 0 likes -
Replying to @gregyoung
@gregyoung@kellabyte@DoeboizMyers@mjpt777 How do I ensure that I don't end up doing random I/O?1 reply 0 retweets 0 likes -
Replying to @ayende
@ayende@gregyoung@kellabyte@DoeboizMyers Study how databases have for decades. You write a journal. DB is just a cache of the journal.5 replies 0 retweets 4 likes -
Replying to @mjpt777
@mjpt777@ayende@gregyoung@DoeboizMyers Also many database papers cover how to do up front scheduling to reduce conflicts/locking1 reply 0 retweets 0 likes
@kellabyte @mjpt777 @ayende @gregyoung @DoeboizMyers Ch 3 of Bernstein's concurrency control & recovery in dbms's still a great resource...
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Replying to @darachennis
@kellabyte@mjpt777@ayende@gregyoung@DoeboizMyers URL here http://research.microsoft.com/en-us/people/philbe/chapter3.pdf … - Whole book is available on MS research website0 replies 3 retweets 8 likesThanks. Twitter will use this to make your timeline better. UndoUndo
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