Rebuild a Volume: Meta1
Preparation
First, run gridinit_cmd restart @meta1; this allows you to check that meta services are up.
If scores are low, the rebuilder can take a long time and can fail due to a timeout.
You can check the score by running openio cluster list meta1.
Launch rebuilding
You can launch the rebuild by using the oio-meta1-rebuilder tool:
# oio-meta1-rebuilder <NAMESPACE> 16322 7F4F92F0BC30 log INFO START volume=None last_report=2018-09-18T11:17:01 0.00s prefixes=0 0.00/s errors=0 0.00% start_time=2018-09-18T11:17:01 0.00s total_prefixes=0 0.00/s total_errors=0 0.00% 16322 7F4F90F4D7D0 log INFO RUN volume=None last_report=2018-09-18T11:17:01 10.06s prefixes=541 53.75/s errors=0 0.00% start_time=2018-09-18T11:17:01 10.06s total_prefixes=541 53.75/s total_errors=0 0.00% 16322 7F4F90F4D7D0 log INFO RUN volume=None last_report=2018-09-18T11:17:11 10.10s prefixes=427 42.28/s errors=0 0.00% start_time=2018-09-18T11:17:01 20.16s total_prefixes=968 48.01/s total_errors=0 0.00% 16322 7F4F92F0BC30 log INFO DONE volume=None last_report=2018-09-18T11:17:21 2.35s prefixes=6 2.55/s errors=0 0.00% start_time=2018-09-18T11:17:01 22.52s total_prefixes=974 43.26/s total_errors=0 0.00%
Options
If you want more information about current rebuilding, you can change the report interval using the --report-interval option.
The default value is set to 3600 seconds, but if you want a report every minute, you can launch rebuilding using oio-meta1-rebuilder --report-interval 60.
By default, rebuilding uses only one worker; you can set a number of workers using the --workers option.
For example, oio-meta1-rebuilder --workers 42 launches rebuilding using 42 workers.
Workers have a limited number of prefixes to rebuild per seconds, 30 by default: the goal is to maintain the meta performance during the rebuilding.
You can change this value using the --prefixes-per-seconds option. If you want to unlimit the number of prefixes to rebuild per second,
you can use oio-meta1-rebuilder --prefixes-per-seconds 0.
If you want to rebuild only some containers, you can specify a file. This file must contain container prefix IDs.
The prefix ID size is stored in sds.conf (meta1_digits=4). You just need to give first digits of base_name line of openio container show <container>.
For example, if you want to rebuuild only container1:
# openio container show container1 +----------------+--------------------------------------------------------------------+ | Field | Value | +----------------+--------------------------------------------------------------------+ | account | my_account | | base_name | 43839DACDD060FA939FAE2714A60640BDC5AFFDDBE8C494BDAB7AA994C3190A5.1 | | bytes_usage | 335B | | container | container1 | | ctime | 1530778169 | | max_versions | Namespace default | | objects | 2 | | quota | Namespace default | | status | Enabled | | storage_policy | Namespace default | +----------------+--------------------------------------------------------------------+
You can specify 4383 for the file and launch rebuilding using:
# oio-meta1-rebuilder <NAMESPACE> --input-file file