wait "geili" reply 2011/6/1 Preston Chang <zhangyf2...@gmail.com>
> 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 > >
