I disable the disk cache of RAID controller, unfortunately it still lost some data.
2011/6/1 Peter Schuller <peter.schul...@infidyne.com> > > 1). set commitlog sync in batch mode and the sync batch window in 0 ms > > 2). one client wrote random keys in infinite loop with consistency level > > QUORUM and record the keys in file after the insert() method return > normally > > 3). unplug one server (node A) power cord > > 4). restart the server and cassandra service > > 5). read the key list generated in step 2) with consistency level ONE > > How sure are you that the system is honoring fsync() properly, > including flushing any caches on underlying drives? Or is this with > battery backed caching RAID controllers? > > -- > / Peter Schuller > -- by Preston Chang
