On Thu, Aug 11, 2011 at 9:05 PM, Dan Retzlaff <[email protected]> wrote: > Based on my testing, with DiskPageStore#isSynchronous() of true > (non-default), the http threads do the writes themselves which can mean many > concurrent writes for many concurrent session requests. Not sure if you > meant to imply that it was irrelevant or just a little unintuitive. :) I meant the later.
Additionally check https://cwiki.apache.org/confluence/display/WICKET/Page+Storage This page describes the default flow in Wicket 1.5 > > Definitely one of the cooler parts of the Wicket code in my opinion! > > On Thu, Aug 11, 2011 at 3:25 AM, Martin Grigorov <[email protected]>wrote: > >> Do you experience slowness in disk write ? >> Any proofs like iostat/iotop output ? >> >> DiskPageStore#isSynchronous() means something slightly different. >> Asynchronous means that the worker http thread will not wait for the >> write to the disk, i.e. the write is detached. But writes are still >> synchronous in the special "page-saving-thread". >> Additionally NIO is used - each http session opens its own FileChannel >> that writes to a specific file for that session. >> >> On Thu, Aug 11, 2011 at 10:43 AM, Dan Retzlaff <[email protected]> >> wrote: >> > In the default configuration, SecondLevelCacheSessionStore is backed by >> > DiskPageStore which (by default) uses a single thread to save pages. This >> > can be customized by overriding Application.newSessionStore() and >> > DiskPageStore.isSynchronous(). >> > >> > On Thu, Aug 11, 2011 at 12:32 AM, Martin Makundi < >> > [email protected]> wrote: >> > >> >> "Disk I/O slows down a LOT when run in parallel. Only one thread >> >> should do disk read/write at a time." >> >> >> >> Is serialization in Wicket performed using an executor or similar >> >> structure to optimize performance? >> >> >> >> ** >> >> Martin >> >> >> > >> >> >> >> -- >> Martin Grigorov >> jWeekend >> Training, Consulting, Development >> http://jWeekend.com >> > -- Martin Grigorov jWeekend Training, Consulting, Development http://jWeekend.com
