On Mon, May 14, 2012 at 10:34 AM, zhangcheng <zhangch...@jike.com> wrote:
> thanks, Edward. > > In my test, when I changed to leveled strategy, the compaction can't > finish for the reason that we have 700G new data every day! > > what can I do if I want to save the comapction space? > > > For so big dataset, you may trigger the manual compaction periodically as long as there is not much deletions. Putting several TB data to a single data requires much computing and IO power to serve the read request or compaction. > > > zhangcheng > > From: Edward Capriolo > Date: 2012-05-14 10:14 > To: dev; zhangcheng > Subject: Re: how to upgrade my cassadra from SizeTieredCompaction to > LeveledCompactiom > As soon as you use the CLI to change the compaction strategy for a > column family Cassandra will consider all SSTables level 0 and being > level-ing them. With that much data, think hard before making the > change. You have to understand how level ed will work with your > workload. > > On Sun, May 13, 2012 at 10:09 PM, zhangcheng <zhangch...@jike.com> wrote: > > > > There is 2T data on each server. Can someone give me some advice? > > > > Thanks. >
