Shulou(Shulou.com)06/01 Report--

I. requirements

Create a table with the snappy compression attribute in the Hbase database.

Log in to the hbase database to perform table creation

Hbase (main): 016 dcs:t_dev_history', 0 > create 'dcs:t_dev_history', {NAME = > faint, DATA_BLOCK_ENCODING = >' PREFIX_TREE', BLOOMFILTER = > 'ROW', REPLICATION_SCOPE = >' 0mm, VERSIONS = > '1mm, COMPRESSION = >' SNAPPY', MIN_VERSIONS = > '0mm, TTL = >' 2678400mm, KEEP_DELETED_CELLS = > 'FALSE', BLOCKSIZE = >' 65536th, IN_MEMORY = > 'false', BLOCKCACHE = >' true'}

Channel 6: open failed: administratively prohibited: open failed

None of the previously created tables use snappy compression. It is suspected that snappy is not installed.

3. Check all hbase nodes

The Master1 node snappy is installed correctly

[hadoop@hadoop-test-Master1 lib] $cd $HBASE_HOME/lib/native/Linux-amd64-64 /

[hadoop@hadoop-test-Master1 Linux-amd64-64] $ls

Libhadoop.a libhadoopsnappy.so.0 libhadoop.so.1.0.0 libhdfs.so libpython2.7.so libsnappy.so.1

Libhadooppipes.a libhadoopsnappy.so.0.0.1 libhadooputils.a libhdfs.so.0.0.0 libpython2.7.so.1.0 libsnappy.so.1.2.0

Libhadoopsnappy.so libhadoop.so libhdfs.a libjvm.so libsnappy.so

Incorrect installation of Master2 node snappy. Guess the wrong path of scp during installation.

[hadoop@hadoop-test-Master2 ~] $cd / var/lib/hbase/lib/native/-found no Linux-amd64-64 directory

[hadoop@hadoop-test-Master2 native] $ls

Libhadoop.a libhadoopsnappy.so.0 libhadoop.so.1.0.0 libhdfs.so libpython2.7.so libsnappy.so.1

Libhadooppipes.a libhadoopsnappy.so.0.0.1 libhadooputils.a libhdfs.so.0.0.0 libpython2.7.so.1.0 libsnappy.so.1.2.0

Libhadoopsnappy.so libhadoop.so libhdfs.a libjvm.so

Libsnappy.so

IV. Processing process

1. Transfer the file to the specified node

Scp-rp Linux-amd64-64 hadoop-test-Master2:/var/lib/hbase/lib/native/

Scp-rp Linux-amd64-64 hadoop-test-Node1:/var/lib/hbase/lib/native/

two。 Then restart the hbase cluster

. / stop-hbase.sh

. / start-hbase.sh

3. Table recreated successfully.

5. Summary

As a dba, the relevant operations must be verified, must be verified, must have a rigorous attitude.

Many problems encountered are not technical problems at all, but some people never pay attention and muddle along.

Compression is a good way to save space in hadoop and hbase and is worth advocating, especially when funds are tight.

Snappy needs to be installed separately, not included with the installation hadoop, so you need to pay attention to it.

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