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From Amit Adhau <amit.ad...@globant.com>
Subject Kudu Data Storage Size Mistmatch On dashboard / data folder
Date Thu, 28 Apr 2016 13:03:12 GMT
Hi Kudu team,

I have below observations for kudu data storage size mismatch;

I was having similar observation last week when total on-disk size was
between 4-5GB and data folder was showing 180GB. Hence, we have cleaned all
kudu data and created new master and tablet data directories. That means
kudu was having zero table. After that, we created a new table in kudu and
inserted just single record as 1461842027,'Test Event'.

1] Now, On Kudu Dashboard - TOTAL On-Disk Size in Kudu is 250B, for a
single table having single record[1461842027,'Test Event']


Result for bytes_under is as per below;

For Link:- http://kuduserver:8051/metrics?metrics=bytes_under

        "type": "server",
        "id": "kudu.master",
        "attributes": {},
        "metrics": [
                "name": "log_block_manager_bytes_under_management",
                "value": 48549

For Link:- http://kuduserver:8050/metrics?metrics=bytes_under

"type": "server",
        "id": "kudu.tabletserver",
        "attributes": {},
        "metrics": [
                "name": "log_block_manager_bytes_under_management",
                "value": 4657

3] And data folder size on both tablet server is 161MB.

as confirmed earlier, Total on-disk size[1] should be equal to Data folder
size[3] and probably [2] should be also in sync.

Can you please suggest, if this is normal or if it is an issue. This would
be important factor while planning for capacity.

FYI, On our Kudu cluster, we have 2 tablet server and a master[running as
tablet as well]

Thanks & Regards,

*Amit Adhau* | Data Architect

*GLOBANT* | IND:+91 9821518132

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