[1] https://postgrespro.com/docs/enterprise/13/app-pgprobackup
- PITR依賴continuous WAL archiving:
Making backups in PAGE backup mode, performing PITR and making backups with ARCHIVE WAL delivery mode require continuous WAL archiving to be enabled.
You can use both STREAM and ARCHIVE backups for point in time recovery as long as the WAL archive is available at least starting from the time the backup was taken.
- PTRACK增量備份模式，及incremental restore，要求initdb時
--data-checksums.- ptrack,后面使用pg_checksums --enable也不管用
- todo incremental restore呢？
- todo stream,archive有什么區別
初始化
pg_probackup init -B $HOME/probackup
pg_probackup add-instance -B $HOME/probackup -D $HOME/pgdata2 --instance pg5433
archive_mode = on
archive_command = '"$HOME/.local/pgsql/bin/pg_probackup" archive-push -B "$HOME/probackup" --instance pg5433 --wal-file-name=%f'
# pg_ctl start
全量，及PAGE增量備份
pg_probackup backup -B $HOME/probackup --instance pg5433 -b FULL -p 5433 -d postgres
pg_probackup backup -B $HOME/probackup --instance pg5433 -b PAGE -p 5433 -d postgres
pg_probackup backup -B $HOME/probackup --instance pg5433 -b PAGE -p 5433 -d postgres --log-level-file=info
# --log-level-file默認off，打開后默認記錄在-B/log
pg_probackup show -B $HOME/probackup
BACKUP INSTANCE 'pg5433'
=================================================================================================================================
Instance Version ID Recovery Time Mode WAL Mode TLI Time Data WAL Zratio Start LSN Stop LSN Status
=================================================================================================================================
pg5433 13 R2RP9H 2021-11-18 20:27:17+08 PAGE ARCHIVE 1/1 1s 106kB 16MB 1.00 0/8000028 0/90000B8 OK
pg5433 13 R2RP38 2021-11-18 20:23:32+08 PAGE ARCHIVE 1/1 1s 106kB 16MB 1.00 0/5000028 0/60000F0 OK
pg5433 13 R2RP1U 2021-11-18 20:22:44+08 FULL ARCHIVE 1/0 6s 23MB 16MB 1.00 0/2000028 0/30000F0 OK
pg_probackup show -B $HOME/probackup --instance pg5433
pg_probackup show -B $HOME/probackup --archive
洗掉不需要的備份資料
pg_probackup delete -B $HOME/probackup --instance pg5433 --delete-expired
pg_probackup delete -B $HOME/probackup --instance pg5433 --delete-wal
pg_probackup delete -B $HOME/probackup --instance pg5433 --status=ERROR
恢復
pg_probackup validate -B $HOME/probackup --instance pg5433
pg_probackup restore -B $HOME/probackup --instance pg5433 -D $HOME/pgdata2-restored
pg_probackup validate -B $HOME/probackup --instance pg5433 --recovery-target-time="2021-11-18 20:15:32+08"
# => ERROR: Backup satisfying target options is not found.
pg_probackup validate -B $HOME/probackup --instance pg5433 --recovery-target-time="2021-11-18 20:23:32+08"
pg_probackup validate -B $HOME/probackup --instance pg5433 --recovery-target-time="2021-11-18 20:25:32+08"
# => INFO: Backup validation completed successfully on time 2021-11-18 20:23:32+08, xid 485 and LSN 0/60000F0
pg_probackup validate -B $HOME/probackup --instance pg5433 --recovery-target-time="2021-11-18 20:35:32+08"
# => WARNING: Thread [1]: Could not read WAL record at 0/A000000
# ERROR: Thread [1]: WAL segment "/home/postgres/probackup/wal/pg5433/00000001000000000000000A" is absent
# WARNING: Recovery can be done up to time 2021-11-18 20:27:17+08, xid 485 and LSN 0/90000B8
# ERROR: Not enough WAL records to time 2021-11-18 20:35:32+08
pg_probackup restore -B $HOME/probackup --instance pg5433 -D $HOME/pgdata2-restored2 --recovery-target-time="2021-11-18 20:23:32+08"
DELTA增量備份
pg_probackup backup -B $HOME/probackup --instance pg5433 -b DELTA -p 5433 -d postgres --log-level-file=info
PTRACK增量備份，要求--data-checksums
pg_probackup backup -B $HOME/probackup --instance pg5433 -b PTRACK -p 5433 -d postgres --log-level-file=info
# WARNING: This PostgreSQL instance was initialized without data block checksums. pg_probackup have no way to detect data block corruption without them. Reinitialize PGDATA with option '--data-checksums'.
# WARNING: Current PostgreSQL role is superuser. It is not recommended to run pg_probackup under superuser.
# ERROR: This PostgreSQL instance does not support ptrack
# WARNING: Backup R2TMDU is running, setting its status to ERROR
pg_probackup show -B $HOME/probackup
BACKUP INSTANCE 'pg5433'
=====================================================================================================================================
Instance Version ID Recovery Time Mode WAL Mode TLI Time Data WAL Zratio Start LSN Stop LSN Status
=====================================================================================================================================
pg5433 13 R2TMDU ---- PTRACK ARCHIVE 0/0 0 0 0 1.00 0/0 0/0 ERROR
pg5433 13 R2TMDK 2021-11-19 21:20:08+08 DELTA ARCHIVE 1/1 1s 106kB 16MB 1.00 0/11000028 0/120000B8 OK
pg5433 13 R2SQBU 2021-11-19 09:47:54+08 PAGE ARCHIVE 1/1 1s 106kB 16MB 1.00 0/E000028 0/F0000B8 OK
pg5433 13 R2SQAS 2021-11-19 09:47:16+08 PAGE ARCHIVE 1/1 1s 106kB 16MB 1.00 0/B000028 0/C0000B8 OK
pg5433 13 R2RP9H 2021-11-18 20:27:17+08 PAGE ARCHIVE 1/1 1s 106kB 16MB 1.00 0/8000028 0/90000B8 OK
pg5433 13 R2RP38 2021-11-18 20:23:32+08 PAGE ARCHIVE 1/1 1s 106kB 16MB 1.00 0/5000028 0/60000F0 OK
pg5433 13 R2RP1U 2021-11-18 20:22:44+08 FULL ARCHIVE 1/0 6s 23MB 16MB 1.00 0/2000028 0/30000F0 OK
在有交易時增量備份
pgbench -i -s 10 postgres -p 5433
pgbench -c 2 -T 100 -R 100 -p 5433 postgres
pg_probackup backup -B $HOME/probackup --instance pg5433 -b PAGE -p 5433 -d postgres --log-level-file=info
pg_probackup backup -B $HOME/probackup --instance pg5433 -b DELTA -p 5433 -d postgres --log-level-file=info
pg_probackup show -B $HOME/probackup
BACKUP INSTANCE 'pg5433'
====================================================================================================================================
Instance Version ID Recovery Time Mode WAL Mode TLI Time Data WAL Zratio Start LSN Stop LSN Status
====================================================================================================================================
pg5433 13 R2V30W 2021-11-20 16:17:21+08 PAGE ARCHIVE 1/1 2s 11MB 16MB 1.00 0/42000028 0/43056098 OK
pg5433 13 R2V30O 2021-11-20 16:17:12+08 DELTA ARCHIVE 1/1 1s 24MB 16MB 1.00 0/3F003E48 0/40090DB0 OK
pg5433 13 R2V304 2021-11-20 16:16:53+08 DELTA ARCHIVE 1/1 2s 35MB 16MB 1.00 0/3B002130 0/3C0D02F8 OK
pg5433 13 R2V2ZC 2021-11-20 16:16:25+08 PAGE ARCHIVE 1/1 2s 154MB 16MB 1.00 0/36000150 0/3719D628 OK
pg5433 13 R2TMOZ 2021-11-19 21:26:59+08 DELTA ARCHIVE 1/1 1s 106kB 16MB 1.00 0/29000028 0/2A0000B8 OK
pg5433 13 R2TMOI 2021-11-19 21:26:42+08 PAGE ARCHIVE 1/1 1s 106kB 16MB 1.00 0/27000028 0/280000B8 OK
pg5433 13 R2TMO9 2021-11-19 21:26:34+08 DELTA ARCHIVE 1/1 2s 106kB 16MB 1.00 0/24000028 0/250000B8 OK
pg5433 13 R2TMO0 2021-11-19 21:26:24+08 PAGE ARCHIVE 1/1 1s 106kB 16MB 1.00 0/22000028 0/230000B8 OK
pg5433 13 R2TMNR 2021-11-19 21:26:16+08 DELTA ARCHIVE 1/1 2s 106kB 16MB 1.00 0/1F000028 0/200000B8 OK
pg5433 13 R2TMNH 2021-11-19 21:26:05+08 PAGE ARCHIVE 1/1 1s 106kB 16MB 1.00 0/1D000028 0/1E0000B8 OK
pg5433 13 R2TMNA 2021-11-19 21:25:58+08 DELTA ARCHIVE 1/1 1s 106kB 16MB 1.00 0/1B000028 0/1C0000F0 OK
pg5433 13 R2TMN1 2021-11-19 21:25:50+08 PAGE ARCHIVE 1/1 2s 106kB 16MB 1.00 0/19000028 0/1A0000B8 OK
pg5433 13 R2TMMR 2021-11-19 21:25:39+08 DELTA ARCHIVE 1/1 1s 106kB 16MB 1.00 0/17000028 0/180000B8 OK
pg5433 13 R2TMM7 2021-11-19 21:25:20+08 PAGE ARCHIVE 1/1 2s 106kB 16MB 1.00 0/14000028 0/150000B8 OK
pg5433 13 R2TMDK 2021-11-19 21:20:08+08 DELTA ARCHIVE 1/1 1s 106kB 16MB 1.00 0/11000028 0/120000B8 OK
pg5433 13 R2SQBU 2021-11-19 09:47:54+08 PAGE ARCHIVE 1/1 1s 106kB 16MB 1.00 0/E000028 0/F0000B8 OK
pg5433 13 R2SQAS 2021-11-19 09:47:16+08 PAGE ARCHIVE 1/1 1s 106kB 16MB 1.00 0/B000028 0/C0000B8 OK
pg5433 13 R2RP9H 2021-11-18 20:27:17+08 PAGE ARCHIVE 1/1 1s 106kB 16MB 1.00 0/8000028 0/90000B8 OK
pg5433 13 R2RP38 2021-11-18 20:23:32+08 PAGE ARCHIVE 1/1 1s 106kB 16MB 1.00 0/5000028 0/60000F0 OK
pg5433 13 R2RP1U 2021-11-18 20:22:44+08 FULL ARCHIVE 1/0 6s 23MB 16MB 1.00 0/2000028 0/30000F0 OK
pg_probackup validate -B $HOME/probackup --instance pg5433 --recovery-target-time="2021-11-19 21:26:32+08"
pg_probackup validate -B $HOME/probackup --instance pg5433 --recovery-target-time="2021-11-19 21:26:52+08"
增量恢復，兩種模式（checksum,lsn）都需要--data-checksums
pg_probackup restore -B $HOME/probackup --instance pg5433 -D $HOME/pgdata2 -I lsn
pg_probackup restore -B $HOME/probackup --instance pg5433 -D $HOME/pgdata2 -I lsn
# INFO: Running incremental restore into nonempty directory: "/home/postgres/pgdata2"
# WARNING: Postmaster with pid 1405 is running in destination directory "/home/postgres/pgdata2"
# INFO: Trying to read pg_control file in destination directory
# ERROR: Incremental restore is not allowed
pg_ctl -D ~/pgdata2 -l ~/repos/postgres/logfile2 stop
# waiting for server to shut down.... done
# server stopped
pg_probackup restore -B $HOME/probackup --instance pg5433 -D $HOME/pgdata2 -I lsn
# INFO: Running incremental restore into nonempty directory: "/home/postgres/pgdata2"
# INFO: Trying to read pg_control file in destination directory
# ERROR: Incremental restore in 'lsn' mode require data_checksums to be enabled in destination data directory
使用pg_checksums --enable后再ptrack, 還是報錯
$ stop pg
waiting for server to shut down.... done
server stopped
$ pg_checksums --enable -D pgdata2
Checksum operation completed
Files scanned: 916
Blocks scanned: 2967
pg_checksums: syncing data directory
pg_checksums: updating control file
Checksums enabled in cluster
$ start pg
pg_ctl: PID file "/home/postgres/pgdata2/postmaster.pid" does not exist
Is server running?
trying to start server anyway
waiting for server to start.... done
server started
$ pg_probackup backup -B $HOME/probackup --instance pg5433 -b PTRACK -p 5433 -d postgres --log-level-file=info
INFO: Backup start, pg_probackup version: 2.5.2, instance: pg5433, backup ID: R2V105, backup mode: PTRACK, wal mode: ARCHIVE, remote: false, compress-algorithm: none, compress-level: 1
WARNING: Current PostgreSQL role is superuser. It is not recommended to run pg_probackup under superuser.
ERROR: This PostgreSQL instance does not support ptrack
WARNING: Backup R2V105 is running, setting its status to ERROR
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