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https://issues.apache.org/jira/browse/HBASE-4440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13184294#comment-13184294
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Jean-Daniel Cryans commented on HBASE-4440:
-------------------------------------------
bq. whether we use presplit option or not, table has to be recreated for all
write-mode tests.
No, it shouldn't be different from the default behavior of not recreating the
table.
bq. or pre-split should try to split the table without re-creating it.
It should not.
Code speaks more than words, here's what I'm using for testing 0.92:
{code}
private boolean checkTable(HBaseAdmin admin) throws IOException {
HTableDescriptor tableDescriptor = getTableDescriptor();
boolean tableExists = admin.tableExists(tableDescriptor.getName());
if (!tableExists) {
if (this.presplitRegions > 0) {
byte[][] splits = getSplits();
for (int i=0; i < splits.length; i++) {
LOG.debug(" split " + i + ": " + Bytes.toStringBinary(splits[i]));
}
admin.createTable(tableDescriptor, splits);
LOG.info ("Table created with " + this.presplitRegions + " splits");
}
else {
admin.createTable(tableDescriptor);
LOG.info("Table " + tableDescriptor + " created");
}
}
return !tableExists;
}
{code}
> add an option to presplit table to PerformanceEvaluation
> --------------------------------------------------------
>
> Key: HBASE-4440
> URL: https://issues.apache.org/jira/browse/HBASE-4440
> Project: HBase
> Issue Type: Improvement
> Components: util
> Reporter: Sujee Maniyam
> Assignee: Sujee Maniyam
> Priority: Minor
> Labels: benchmark
> Fix For: 0.94.0
>
> Attachments: PerformanceEvaluation.java,
> PerformanceEvaluation_HBASE_4440.patch,
> PerformanceEvaluation_HBASE_4440_2.patch
>
>
> PerformanceEvaluation a quick way to 'benchmark' a HBase cluster. The
> current 'write*' operations do not pre-split the table. Pre splitting the
> table will really boost the insert performance.
> It would be nice to have an option to enable pre-splitting table before the
> inserts begin.
> it would look something like:
> (a) hbase ...PerformanceEvaluation --presplit=10 <other options>
> (b) hbase ...PerformanceEvaluation --presplit <other options>
> (b) will try to presplit the table on some default value (say number of
> region servers)
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