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[HDFS-4403] DFSClient can infer checksum type when not provided by reading first byte - HDFS - [issue]
...HDFS-3177 added the checksum type to OpBlockChecksumResponseProto, but the new protobuf field is optional, with a default of CRC32. This means that this API, when used against an older clust...
http://issues.apache.org/jira/browse/HDFS-4403    Author: Todd Lipcon, 2013-01-22, 14:04
[HDFS-4418] HDFS-347: increase default FileInputStreamCache size - HDFS - [issue]
...The FileInputStreamCache currently defaults to holding only 10 input stream pairs (corresponding to 10 blocks). In many HBase workloads, the region server will be issuing random reads agains...
http://issues.apache.org/jira/browse/HDFS-4418    Author: Todd Lipcon, 2013-01-17, 23:11
[HDFS-3429] DataNode reads checksums even if client does not need them - HDFS - [issue]
...Currently, even if the client does not want to verify checksums, the datanode reads them anyway and sends them over the wire. This means that performance improvements like HBase's applicatio...
http://issues.apache.org/jira/browse/HDFS-3429    Author: Todd Lipcon, 2013-01-15, 13:20
[HDFS-3677] dfs.namenode.edits.dir.required missing from hdfs-default.xml - HDFS - [issue]
...This config should be documented. It's useful for cases where the user would like to ensure that (eg) an NFS filer always has the most up-to-date edits....
http://issues.apache.org/jira/browse/HDFS-3677    Author: Todd Lipcon, 2012-12-28, 03:49
[HDFS-3571] Allow EditLogFileInputStream to read from a remote URL - HDFS - [issue]
...In order to start up from remote edits storage (like the JournalNodes of HDFS-3077), the NN needs to be able to load edits from a URL, instead of just local disk. This JIRA extends EditLogFi...
http://issues.apache.org/jira/browse/HDFS-3571    Author: Todd Lipcon, 2012-12-11, 19:45
[HDFS-2525] Race between BlockPoolSliceScanner and append - HDFS - [issue]
...I wrote a test which runs append() in a loop on a single file with a single replica, appending 0~100 bytes each time. If this races with the BlockPoolSliceScanner, I observe the BlockPoolSli...
http://issues.apache.org/jira/browse/HDFS-2525    Author: Todd Lipcon, 2012-12-10, 22:28
[HDFS-3626] Creating file with invalid path can corrupt edit log - HDFS - [issue]
...Joris Bontje reports the following:The following command results in a corrupt NN editlog (note the double slash and reading from stdin):$ cat /usr/share/dict/words | hadoop fs -put - hdfs://...
http://issues.apache.org/jira/browse/HDFS-3626    Author: Todd Lipcon, 2012-12-04, 19:40
[expand - 2 more] - Re: profiling hdfs write path - HDFS - [mail # dev]
...On Tue, Dec 4, 2012 at 9:07 AM, Radim Kolar  wrote:  If you're just going to insult us, please stay away. We don't need your help unless you're going to be constructive.  Todd...
   Author: Todd Lipcon, 2012-12-04, 17:27
[HDFS-2014] bin/hdfs no longer works from a source checkout - HDFS - [issue]
...bin/hdfs now appears to depend on ../libexec, which doesn't exist inside of a source checkout:todd@todd-w510:~/git/hadoop-hdfs$ ./bin/hdfs namenode./bin/hdfs: line 22: /home/todd/git/hadoop-...
http://issues.apache.org/jira/browse/HDFS-2014    Author: Todd Lipcon, 2012-11-29, 09:11
[HDFS-4169] Add per-disk latency metrics to DataNode - HDFS - [issue]
...Currently, if one of the drives on the DataNode is slow, it's hard to determine what the issue is. This can happen due to a failing disk, bad controller, etc. It would be preferable to expos...
http://issues.apache.org/jira/browse/HDFS-4169    Author: Todd Lipcon, 2012-11-29, 03:34
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