Re: Re: eliminate need to repair by using column TTL??

2011-07-22 Thread jonathan . colby
good points Aaron. I realize now how expensive repair on reads are. I'm going to keep doing repairs regularly but still have a max TTL on all columns to make sure we don't have really old data we no longer need getting buried in the cluster. On , aaron morton wrote: Read repair will only r

Re: eliminate need to repair by using column TTL??

2011-07-22 Thread aaron morton
Read repair will only repair data that is read on the nodes that are up at that time, and does not guarantee that any changes it detects will be written back to the nodes. The diff mutations are async fire and forget messages which may go missing or be dropped or ignored by the recipient just li

eliminate need to repair by using column TTL??

2011-07-22 Thread jonathan . colby
One of the main reasons for regularly running repair is to make sure deletes are propagated in the cluster, ie, data is not resurrected if a node never received the delete call. And repair-on-read takes care of repairing inconsistencies "on-the-fly". So if I were to set a universal TTL on al

Re: Column TTL Hook

2011-03-24 Thread Jonathan Ellis
No. On Thu, Mar 24, 2011 at 8:50 AM, Or Yanay wrote: > Hi all, > > Is there any way for me to save or pass the columns retired by the column > TTL? > > I understand that compaction takes care of removing expired columns, I would > like to know the keys for which

Column TTL Hook

2011-03-24 Thread Or Yanay
Hi all, Is there any way for me to save or pass the columns retired by the column TTL? I understand that compaction takes care of removing expired columns, I would like to know the keys for which columns have expired. Thanks, -Orr

RE: Column TTL

2010-10-06 Thread Dan Hendry
Ah, great, thanks. I was looking under trunk/src/java/... instead of trunk/interface/... Dan From: Michal Augustýn [mailto:augustyn.mic...@gmail.com] Sent: October-06-10 10:38 To: user@cassandra.apache.org Subject: Re: Column TTL Hi, I checked Cassandra.thrift file and found

Re: Column TTL

2010-10-06 Thread Michal Augustýn
Hi, I checked Cassandra.thrift file and found: @param ttl. An optional, positive delay (in seconds) after which the column will be automatically deleted. Augi 2010/10/6 Dan Hendry > Hi, > > > > I have a quick and quite frankly ridiculous question regarding the column > T

Column TTL

2010-10-06 Thread Dan Hendry
Hi, I have a quick and quite frankly ridiculous question regarding the column TTL value; what are the time units? Milliseconds/seconds or something else? I initially thought milliseconds given that it is Java and that is what timestamps are in but the data type used in the setTll() Java