My Cassandra version is 2.1.4. Thanks Rock
On Aug 10, 2015, at 9:52 AM, rock zhang <r...@alohar.com> wrote: > Hi All, > > Currently i have three hosts. The data is not balanced, one is 79G, another > two have 300GB. When I adding a new host, firstly I got "too many open files" > error, then i changed file open limit from 100,000 to 1, 000, 000. Then I got > OOM error. > > Should I change the limits to 20,0000 instead of 1M? My memory is 33G, i am > using EC2 c2*2xlarge. Ideally even if the data is large, just slower, should > not OOM, don't understand why . > > I actually got this error pretty often. I guess the reason is because my data > is pretty large? If cassandra try to split the data evenly on all host, then > Cassandra need to copy around 200GB to the new host. > > From my experience, An alternative way to solve this is add new host as seed, > do not use "Add host", then data would be move, so so OOM. But not sure data > will be lost or cannot be located. > > Thanks > Rock >
