Re: Question about eventually consistent in Cassandra

2011-08-03 Thread Ryan King
On Wed, Aug 3, 2011 at 10:09 AM, mcasandra wrote: > What happens when DC is in different time zone so 9:00 pacific vs 11:00 > Central Nothing. Timestamps have no knowledge of timezones, they're just offsets from an arbitrary point in the past. -ryan

Re: Question about eventually consistent in Cassandra

2011-08-03 Thread mcasandra
What happens when DC is in different time zone so 9:00 pacific vs 11:00 Central -- View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Question-about-eventually-consistent-in-Cassandra-tp6646430p6649490.html Sent from the cassandra-u

Re: Question about eventually consistent in Cassandra

2011-08-03 Thread aaron morton
yup, my bad. A - Aaron Morton Freelance Cassandra Developer @aaronmorton http://www.thelastpickle.com On 3 Aug 2011, at 19:45, Sam Overton wrote: > A slight correction/clarification: > > 1) DeletedColumns always win. If there are two deletes the highest timestamp > wins > >

Re: Question about eventually consistent in Cassandra

2011-08-03 Thread Sam Overton
A slight correction/clarification: 1) DeletedColumns always win. If there are two deletes the highest timestamp > wins DeletedColumns only take precedence over a normal value if they have a greater *(or equal)* timestamp. *"DeletedColumns always win"* is only true if you're talking about two col

Re: Question about eventually consistent in Cassandra

2011-08-02 Thread aaron morton
make conflicting changes with the exact same time stamp? > No idea. > > - Original Message - > From: "Eldad Yamin" > To: user@cassandra.apache.org > Sent: Tuesday, August 2, 2011 8:58:23 PM > Subject: Question about eventually consistent in Cassandra >

Re: Question about eventually consistent in Cassandra

2011-08-02 Thread Konstantin Naryshkin
canonical. What would happen if you make conflicting changes with the exact same time stamp? No idea. - Original Message - From: "Eldad Yamin" To: user@cassandra.apache.org Sent: Tuesday, August 2, 2011 8:58:23 PM Subject: Question about eventually consistent in Cassandra Hi, Let’s

Re: Question about eventually consistent in Cassandra

2011-08-02 Thread Kent Narling
Have not used Cassandra much yet, but it seems pretty clear to me that the entry with the latest timestamp (sent in by the client) will be the one that will be the "winner" eventually. Mark here that this is the timestamp the client send in which is not necessarily the actual time. So eg if the D

Question about eventually consistent in Cassandra

2011-08-02 Thread Eldad Yamin
Hi, Let’s say that I have 2 datacenters, a key is changed on both of my datacenters in the exact same time (even in 1-2 seconds diff). Datacenter #1 add column "abc" with value X Datacenter #2 add column "abc" with value Y. What is the result of that situation? Is there any different if the change