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From "Kuan(謝冠生)" <lakersg...@mail2000.com.tw>
Subject Re: "timestamp" parameter for Thrift "insert" API ??
Date Tue, 21 Sep 2010 02:25:48 GMT
By using cassandra-cli tool, we don't have to input timestamp while insertion. Does it mean
that Cassandra have time synchronization build-in already?
Since cassandra depending on time-stamp parameter very much (both read/write). The most ideal
way to deal with timestamp is by cassandra itself, considering data safty and consistensy....


Kuan


-----Original message-----
From:Michal Augustýn <augustyn.michal@gmail.com>

Consider situation when you have more Cassandra servers. It would require time synchronization
in Cassandra itself. So we have to have time synchronization - on applications servers or
Cassandra servers. I'm not sure if this is concern of Cassandra but it would be good for me...

2010/9/20 Kuan <lakersgogo@mail2000.com.tw>
To whom it may concern,


While timestamp parameter is auto generated by using cassandra-cli tool, why user have to
manually insert the parameter in Cassandra-Thrift "insert" API??

In my point of view, leaving time-stamp to be inserted by client side will lead data into
chaos, since clients' local time might be vary....

Time-Stamp better be generated automatically and consistently by Cassandra Server itself isn't
it?
Any idea??



Best,
KuanSheng
Taipei






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