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How can I find the number of regions for a given HBase table?

I thought it was easy, but could not find the answer. Hope this can be done using command line tools. Or a Python tool.

Or at least find out how many hfiles?

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1 answer

You have several options:

1 Via HTTP: http: // [your_hbase_master]: 60010 / table.jsp? Name = [your_table]

2 Command line:

$ hadoop fs -ls /hbase/[your_table] Found 8 items -rw-r--r-- 3 hbase hbase 1893 2013-05-25 18:03 /hbase/[your_table]/.tableinfo.0000000001 drwxr-xr-x - hbase hbase 0 2013-05-25 18:03 /hbase/[your_table]/.tmp drwxr-xr-x - hbase hbase 0 2014-11-04 06:34 /hbase/[your_table]/045ab87f468ba9e967a0987ca98b7db4 drwxr-xr-x - hbase hbase 0 2014-11-04 06:34 /hbase/[your_table]/062bc3ef65b9db80a1eeb2c1f4229fdb drwxr-xr-x - hbase hbase 0 2014-11-04 06:34 /hbase/[your_table]/0a921049a908dbc929b160210a397632 drwxr-xr-x - hbase hbase 0 2014-11-04 06:34 /hbase/[your_table]/43a9576bad8845f7d7baacc97882eec6 drwxr-xr-x - hbase hbase 0 2014-11-04 06:34 /hbase/[your_table]/f492c709d17c4ded150014543f21e362 drwxr-xr-x - hbase hbase 0 2014-11-04 06:34 /hbase/[your_table]/fa465c6a27023d49893de3c1004efd29

You will get one directory for each region (excluding .tmp y.tableinfo):

3 In JAVA, you can use HBaseAdmin.getTableRegions(byte[])

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Source: https://habr.com/ru/post/1211966/

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