instances of Cassandra.
2011/12/17 魏金仙 sei_...@126.com
My question is whether two groups of initial_token can coexist since our goal
is to partition data of each column family uniformly on 5 nodes.
I deployed Cassandra 0.7.4 on a cluster of 5 nodes, using
orderPreservingPartitioner. Two column
My question is whether two groups of initial_token can coexist since our goal
is to partition data of each column family uniformly on 5 nodes.
I deployed Cassandra 0.7.4 on a cluster of 5 nodes, using
orderPreservingPartitioner. Two column families named CF1 and CF2 are created
on one
hi all,
I'm launching a cassandra cluster with 30 nodes. I wonder whether the
inconsistency of host clocks will influence the performance of cluster.
Thanks!
Can any one tell how to reset keys_cached?
Thanks.
row_Cache caches a whole row, Key_cache caches the key and the row location.
thus, if the request is hit in row_Cache then the result can be given without
disk seek. If it is hit in key_Cache, result can be obtains after one disk seek.
without key_Cache or row_cache, it will check the index file
insert(key, column_path, column, consistency_level) can only insert a standard
column.
Is batch_mutate the only API to insert a super column?
and also can someone tell why batch_insert,multi_get is removed in version
0.7.4?
Hi, can anyone explain why APIs include multiget, batch_insert,get_range_slice
are removed in Version above 7.0?
I just deployed cassandra 0.7.4 as a 6-server cluster and tested its
performance via YCSB.
The result seems confusing when compared to that of Cassandra0.6.6. Under a
write heavy workload(i.e., write/read: 50%/50%), Cassandra0.7.4 obtains a
really satisfactory latency. I mean both the read
about the number of requests, iostats etc. There is no
reason for it to run slower.
Aaron
On 16/04/2011, at 2:35 AM, 魏金仙 sei_...@126.com wrote:
I just deployed cassandra 0.7.4 as a 6-server cluster and tested its
performance via YCSB.
The result seems confusing when compared
I've no idea why it doesn't work well.
We are testing Elasticity of Cassandra 0.6.6.We choose
orderPreservingPartitioner and set replicationFactor as 2.
We start from 6-server cluster(node A, B,C,D,E,F), which is load balanced.
roughly every node has 12GB. we then add node G between A and B.
thank you.
but I mean the probability of a node to receive the request not process it
eventually .
At 2010-12-06 00:56:58，Brandon Williams dri...@gmail.com wrote:
2010/12/5 魏金仙sei_...@126.com
If a particular client send 5 requests to a 6-node cluster, then the
probability of each node
so when will index files be in the memory?
At 2010-12-06 00:54:48，Brandon Williams dri...@gmail.com wrote:
2010/12/5 魏金仙sei_...@126.com
for each sstable, there is an index file, which is loaded in memory to locate a
particular key's offset efficiently.
Index files are not held in memory
for each sstable, there is an index file, which is loaded in memory to locate a
particular key's offset efficiently.
and for each CF, KeysCached can be set to cache keys' location.
could you pls tell me the difference between the two?
I'm wondering whether it's necessary to set KeysCached for a
If a particular client send 5 requests to a 6-node cluster, then the
probability of each node receiving(not be responsible for) the first request is
1/6. Assume that node1 received the 1st request, will node1 receive the 2nd
request, the 3rd one, the 4th one and the 5th one with high
When I load 17GB(as nodetool ring shows) data to a Cassandra node which is
clean before data loading, all the files in the data directory can have a size
larger than 100GB. Is it normal?
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