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From Sandeep Nemuri <nhsande...@gmail.com>
Subject Re: HDFS datanode used space is increasing without any writes
Date Sun, 09 Aug 2015 09:16:27 GMT
What is the size of your Hbase table?

A copy of snapshot will be stored in archive directory.

hadoop fs -du -s -h /apps/hbase/data/data/default/<table-name>
hadoop fs -du -s -h /apps/hbase/data/archive/data/default/<table-name>

Check this directory size.

Thanks
Sandeep Nemuri
ᐧ

On Thu, Jul 30, 2015 at 3:36 PM, Akmal Abbasov <akmal.abbasov@icloud.com>
wrote:

> I am running HBase snapshot exporting, but I stopped it, and still the
> capacity used is increasing.
> Here you can see that it is increased to 60 GB, and mostly it is because
> of 1 detanode.
> Moreover I am checking the directories sizes using bin/hdfs dfs -du -h /
> and while the HDFS used capacity is increasing, the directories sizes in
> HDFS is not changing.
> Any ideas?
>
> p.s. I started a hdfs balancer several days ago, then stopped it after
> running for about 10 minutes, after reading that it is not a good idea to
> run it on the same cluster with HBase.
> Could it be because of this?
>
> Thank you.
>
>
> On 28 Jul 2015, at 19:08, Harshit Mathur <mathursharp@gmail.com> wrote:
>
> Are there any map reduce jobs running?
> On Jul 28, 2015 10:11 PM, "Akmal Abbasov" <akmal.abbasov@icloud.com>
> wrote:
>
>> Hi, I’m observing strange behaviour in HDFS/HBase cluster.
>> The disk space of one of datanodes is increasing very fast even when
>> there are no write requests.
>> It is 8GB per hour in average. Here is the graph which shows it.
>> <screenshot.png>
>> I am using hbase-0.98.7-hadoop2 and hadoop-2.5.1.
>>
>> And this is logs from the node
>> 2015-07-28 15:40:38,795 INFO
>> org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /
>> 10.32.1.12:50010, dest: /10.32.0.140:38699, bytes: 1071, op: HDFS_READ,
>> cliID: DFSClient_NONMAPREDUCE_-689748537_1, offset: 0, srvID:
>> 6c25ffd4-3dc7-4e3a-af56-5cc8aa9220e0, blockid:
>> BP-439084760-10.32.0.180-1387281790961:blk_1074784244_1045663, duration:
>> 17759797
>> 2015-07-28 15:41:15,111 INFO
>> org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving
>> BP-439084760-10.32.0.180-1387281790961:blk_1075311714_1574450 src: /
>> 10.0.0.21:60540 dest: /10.32.1.12:50010
>> 2015-07-28 15:41:15,304 INFO
>> org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /
>> 10.0.0.21:59054, dest: /10.32.1.12:50010, bytes: 124121, op: HDFS_WRITE,
>> cliID: DFSClient_hb_rs_hbase-rs4,60020,1438094355024_530940245_35, offset:
>> 0, srvID: 6c25ffd4-3dc7-4e3a-af56-5cc8aa9220e0, blockid:
>> BP-439084760-10.32.0.180-1387281790961:blk_1075311536_1574238, duration:
>> 3600203675041
>> 2015-07-28 15:41:15,304 INFO
>> org.apache.hadoop.hdfs.server.datanode.DataNode: PacketResponder:
>> BP-439084760-10.32.0.180-1387281790961:blk_1075311536_1574238,
>> type=HAS_DOWNSTREAM_IN_PIPELINE terminating
>> 2015-07-28 15:50:40,745 WARN
>> org.apache.hadoop.hdfs.server.datanode.DataNode: Slow BlockReceiver write
>> data to disk cost:6099ms (threshold=300ms)
>> 2015-07-28 15:59:21,130 INFO
>> org.apache.hadoop.hdfs.server.datanode.DirectoryScanner: BlockPool
>> BP-439084760-10.32.0.180-1387281790961 Total blocks: 65856, missing
>> metadata files:0, missing block files:0, missing blocks in memory:0,
>> mismatched blocks:0
>> 2015-07-28 16:00:16,770 INFO
>> org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving
>> BP-439084760-10.32.0.180-1387281790961:blk_1075311715_1574451 src: /
>> 10.32.1.12:36998 dest: /10.32.1.12:50010
>> 2015-07-28 16:00:17,469 INFO
>> org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /
>> 10.32.1.12:36150, dest: /10.32.1.12:50010, bytes: 32688, op: HDFS_WRITE,
>> cliID: DFSClient_hb_rs_hbase-rs5,60020,1438088401479_1146354759_35, offset:
>> 0, srvID: 6c25ffd4-3dc7-4e3a-af56-5cc8aa9220e0, blockid:
>> BP-439084760-10.32.0.180-1387281790961:blk_1075311706_1574442, duration:
>> 3601152263901
>> 2015-07-28 16:00:17,472 INFO
>> org.apache.hadoop.hdfs.server.datanode.DataNode: PacketResponder:
>> BP-439084760-10.32.0.180-1387281790961:blk_1075311706_1574442,
>> type=HAS_DOWNSTREAM_IN_PIPELINE terminating
>> 2015-07-28 16:03:44,011 INFO
>> org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving
>> BP-439084760-10.32.0.180-1387281790961:blk_1075311716_1574452 src: /
>> 10.0.0.19:35851 dest: /10.32.1.12:50010
>> 2015-07-28 16:03:44,169 INFO
>> org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /
>> 10.0.0.20:40176, dest: /10.32.1.12:50010, bytes: 316062, op: HDFS_WRITE,
>> cliID: DFSClient_hb_rs_hbase-rs1,60020,1438092204868_-99326843_35, offset:
>> 0, srvID: 6c25ffd4-3dc7-4e3a-af56-5cc8aa9220e0, blockid:
>> BP-439084760-10.32.0.180-1387281790961:blk_1075311707_1574443, duration:
>> 3600482062810
>> 2015-07-28 16:03:44,169 INFO
>> org.apache.hadoop.hdfs.server.datanode.DataNode: PacketResponder:
>> BP-439084760-10.32.0.180-1387281790961:blk_1075311707_1574443,
>> type=LAST_IN_PIPELINE, downstreams=0:[] terminating
>> 2015-07-28 16:11:10,961 WARN
>> org.apache.hadoop.hdfs.server.datanode.DataNode: Slow BlockReceiver write
>> data to disk cost:7884ms (threshold=300ms)
>> 2015-07-28 16:11:14,122 WARN
>> org.apache.hadoop.hdfs.server.datanode.DataNode: Slow BlockReceiver write
>> data to disk cost:4362ms (threshold=300ms)
>> 2015-07-28 16:11:14,123 WARN
>> org.apache.hadoop.hdfs.server.datanode.DataNode: Slow flushOrSync took
>> 3160ms (threshold=300ms), isSync:false, flushTotalNanos=3160364203ns
>> 2015-07-28 16:13:29,968 WARN
>> org.apache.hadoop.hdfs.server.datanode.DataNode: Slow BlockReceiver write
>> data to disk cost:659ms (threshold=300ms)
>> 2015-07-28 16:18:33,336 INFO
>> org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving
>> BP-439084760-10.32.0.180-1387281790961:blk_1075311717_1574453 src: /
>> 10.0.0.20:41527 dest: /10.32.1.12:50010
>> 2015-07-28 16:18:38,926 WARN
>> org.apache.hadoop.hdfs.server.datanode.DataNode: Slow BlockReceiver write
>> data to disk cost:1767ms (threshold=300ms)
>> 2015-07-28 16:28:40,580 WARN
>> org.apache.hadoop.hdfs.server.datanode.DataNode: Slow BlockReceiver write
>> data to disk cost:4099ms (threshold=300ms)
>>
>> What could be the cause of this?
>> Thank you.
>>
>>
>>
>


-- 
*  Regards*
*  Sandeep Nemuri*

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