Re: How to reduce the Read Latency.

It's hard to say the latency is to high without knowing how many columns and how many bytes you are asking for. It's also handy to know what the query looks like, i.e. is it a slice or a get by name, and the CF level Latency reported at the CF or KS level are for local read / write

Re: How to reduce the Read Latency.

Thanks Aaron! Through the commands top and iostats, I find the IO system is not overloaded yet. So I will check the data model. And how to get the row size of a specific key? Do we have the api yet? Thanks. -- Dikang Gu 0086 - 18611140205 On Sunday, May 22, 2011 at 6:15 PM, aaron morton

How to reduce the Read Latency.

Hi All, I'm running three cassandra 0.7.4 nodes in a cluster, and I give 2G memory to each node. Now, I get the cfstats here: Keyspace: UserMap Read Count: 38411 Read Latency: 123.54214613001484 ms. Write Count: 44155 Write Latency: 0.02341093873853471 ms. Pending Tasks: 0 Column Family: Map

Re: How to reduce the Read Latency.

What consistency are you asking for? On Fri, May 20, 2011 at 7:42 AM, Dikang Gu dikan...@gmail.com wrote: Hi All, I'm running three cassandra 0.7.4 nodes in a cluster, and I give 2G memory to each node. Now, I get the cfstats here: Keyspace: UserMap Read Count: 38411 Read Latency:

Re: How to reduce the Read Latency.

I use the default consistency level in the hector client, so it should be QUORUM. -- Dikang Gu 0086 - 18611140205 On Friday, May 20, 2011 at 4:25 PM, Jeffrey Kesselman wrote: What consistency are you asking for? On Fri, May 20, 2011 at 7:42 AM, Dikang Gu dikan...@gmail.com wrote: Hi All,

Re: How to reduce the Read Latency.

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