A single-threaded test is meaningless. You need a multithreaded (or multiprocess) benchmark like the one in contrib/py_stress.
Picture worth 1000 words: http://spyced.blogspot.com/2010/01/cassandra-05.html On Thu, Apr 8, 2010 at 3:59 PM, Heath Oderman <he...@526valley.com> wrote: > Hi All, > I'm brand new to Cassandra and know absolutely nothing, so please forgive me > in advance. > A friend and I have each setup a few Cassandra stand alone nodes, completely > default. > His: Mac OSX Snow Leopard > Mac Book Pro > Intel Duo Core > 4GB Ram > 5400 rpm disk > Mine: debian 5.x (lenny) with the deb pack from > http://www.apache.org/dist/cassandra/debian > 2 Desktops > Intel duo core > 4GB ram > 7200 sata drives > 1 blade > 8gb ram > 10000 rpm disk > dual xeon > (i have a windows box too like the 2 desktops) > > (each of those machines is stand alone) > > My debian boxes are brand new installs, nothing else running, purely console > environments, only SSH & Cassandra installed. > The Cassandra configs are the *default configs* with only 'ListenAddress' > and 'ThriftAddress' changed to the ext ip for those boxes. > We generated a C# library with Thrift to connect to these servers. We wrote > a simple c# app that loops 10,000 times and does a > _client.batch_insert(_keyspace, map.Key.GetValue(o, > null).ToString(), dict, ConsistencyLevel.ONE); > "batch_insert" I guess is the key bit up there. > The reason that I'm writing is that the batch_insert call takes 400,000 > ticks every time it is called when running against the debian boxes. Any of > them. > The result is that 10,000 inserts against his machine takes about 30 > seconds, and it takes about 1 min 45 seconds against any of my servers. > (longer against the windows 7 server.) > The MacBookPro is faster while I would expect to be slower. (the macbook > pro is his laptop and he's running mail and all kinds of other stuff > simultaneously.) > I'm on a gigabit network, iostat / top / bmon all show that the Cassandra > server isn't working very hard. > Performance mon on my windows client show my computer running the loop is > hardly working. > I am writing to you to ask where I might go to get information on comparing > the environments, improving my performance, etc. I've been googling all day > and haven't been able to figure anything out. > If this is the wrong forum, sorry! > Thanks for any help/suggestions you might have. > Stu > > > >
