[apurvamehta]

That would be true if we were using C++. Unfortunately, all our code is in Scala and we use Java NIO libraries to memory map our files. AFAIK, they don't give us the option on using these POSIX calls.

[pquerna]

Cassandra binds to posix_fadvise to do exactly this when writing out new SSTables:

https://github.com/apache/cassandra/blob/trunk/src/java/org/...

[apurvamehta]

Wow.. that's great to know. We will definitely investigate this approach. Thanks for sharing! :)