| clear query|facets|time |
Search criteria: .
Results from 71 to 80 from
986 (0.161s).
|
|
|
Loading phrases to help you
refine your search...
|
|
Re: Essential column family performance - HBase - [mail # user]
|
|
...That part did not show up in the profiling session. It was just the unnecessary seek that slowed it all down. ________________________________ From: Ted Yu To: [EMA...
|
|
|
Author: lars hofhansl,
2013-04-10, 04:16
|
|
|
Re: Essential column family performance - HBase - [mail # user]
|
|
...We did some tests here. I ran this through the profiler against a local RegionServer and found the part that causes the slowdown is a seek called here: boolean mayHaveData ...
|
|
|
Author: lars hofhansl,
2013-04-09, 23:47
|
|
|
Re: Declaring HBase Public API in 0.94 - HBase - [mail # dev]
|
|
...It seems we could just generally document that: - no RPC incompatibilities - no API breaking changes to any user facing classes (now we'll pay better attention to this) - best effort to keep...
|
|
|
Author: lars hofhansl,
2013-04-08, 22:08
|
|
|
Re: Essential column family performance - HBase - [mail # user]
|
|
...One of James' motivation was to always be able to enable scanners to make use of essential column families (and thus avoid HBase API version - essential column families was added only in 0.9...
|
|
|
Author: lars hofhansl,
2013-04-08, 21:41
|
|
|
Re: Best way to query multiple sets of rows - HBase - [mail # user]
|
|
...We've had some discussions about turning a set of Gets into (smaller set of Scans). That is only partially applicable here, though. In your case I think you have two options: 1. Fire o...
|
|
|
Author: lars hofhansl,
2013-04-08, 21:37
|
|
|
Re: Essential column family performance - HBase - [mail # user]
|
|
...In this case it is handled all at the server, and if doing scans you still get the benefits of the sequential access pattern (rather doing a lot of seeks for point Gets). _____...
|
|
|
Author: lars hofhansl,
2013-04-08, 21:29
|
|
|
Re: schema design: rows vs wide columns - HBase - [mail # user]
|
|
...I think the main problem is that all CFs have to be flushed if one gets large enough to require a flush. (Does anyone remember why exactly that is? And do we still need that now that the mem...
|
|
|
Author: lars hofhansl,
2013-04-08, 04:39
|
|
|
Re: Essential column family performance - HBase - [mail # user]
|
|
...Looking at the joined scanner test code, it sets it up such that 1% of the rows match, which would somewhat be in line with James' results. In my own testing a while ago I found a 100%...
|
|
|
Author: lars hofhansl,
2013-04-08, 03:52
|
|
|
Re: VOTE: hbase-0.95RC1, the second "Development" Series Release is available [WAS -> VOTE: hbase-0.95.0RC0, the first "Developer Release" release candidate is available for download and vote] - HBase - [mail # dev]
|
|
...Installed the -hadoop1 tarball, started HBase, inserted some data, flushed, compacted, scanned, inspected the UI pages, stopped it again. Checked the docs. CHANGES.txt is a bit weird ...
|
|
|
Author: lars hofhansl,
2013-04-06, 05:31
|
|
|
Re: Interactions between max versions and filters - HBase - [mail # user]
|
|
...Normally Filters are evaluated before the version counting. There was some issue that was fixed recently that changed this behavior specifically for ColumnPaginationFilters and friend... Lem...
|
|
|
Author: lars hofhansl,
2013-04-05, 22:28
|
|
|
|
