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Get the correct increment backup (#176)
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* get the correct increment backup

Before, we actually got the  difference backup, not the incremental backup.
TO solve this probem ,revert #125.

However, if a physical backup file is deleted(rm command, etc.) other than the pg_rman delete command of pg_rman,
It cannot find the correct status of a full backup and incremental backup.(please refer to #154 to details)
WE will solve this problem, at the next major upgarde.

* Revert "get the correct increment backup"

* get the correct increment backup

Before, we actually got the  difference backup, not the incremental backup.
TO solve this probem ,revert #125.

However, if a physical backup file is deleted(rm command, etc.) other than the pg_rman delete command of pg_rman,
It cannot find the correct status of a full backup and incremental backup.(please refer to #154 to details)
WE will solve this problem, at the next major upgarde.

* add the regression test of increment backup

* add the regression test of increment backup

* add the comment

add the comment about the increment backup's problem

* Add a comment

Add a comment

* add the regression test of increment backup

* add the regression test of increment backup

add the regression test of increment backup

* add the comment

* add the regression test

* delete file

becaust upload the wrong place,delete it

* add the regression test

* Reflected the comment

* Reflected the comment

* Reflected the comment

* Reflected the comment

* Reflected the comment

* Reflected the comment

* Reflected the comment

* Regression test command was  modified

* Regression test command was  modified

* Regression test command was modified
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@huangfumingyue @MoonInsung
huangfumingyue authored and MoonInsung committed May 28, 2021
1 parent dbd6245 commit 3605377
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Showing 5 changed files with 42 additions and 16 deletions.
8 changes: 6 additions & 2 deletions backup.c
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Original file line number Diff line number Diff line change
Expand Up @@ -103,7 +103,7 @@ do_backup_database(parray *backup_list, pgBackupOption bkupopt)
pgBackup *prev_backup;

/* find last completed database backup */
prev_backup = catalog_get_last_full_backup(backup_list);
prev_backup = catalog_get_last_data_backup(backup_list);
if (prev_backup == NULL)
{
if (current.full_backup_on_error)
Expand Down Expand Up @@ -185,14 +185,18 @@ do_backup_database(parray *backup_list, pgBackupOption bkupopt)
/*
* To take incremental backup, the file list of the latest validated
* full database backup is needed.
* TODO: fix for issue #154
* When a backup list is deleted with rm command or pg_rman's delete command with '--force' option,
* pg_rman can't detect there is a missing piece of backup.
* We need the way tracing the backup chains or something else...
*/
if (current.backup_mode < BACKUP_MODE_FULL)
{
pgBackup *prev_backup;
uint32 xlogid, xrecoff;

/* find last completed database backup */
prev_backup = catalog_get_last_full_backup(backup_list);
prev_backup = catalog_get_last_data_backup(backup_list);
if (prev_backup == NULL || prev_backup->tli != current.tli)
{
if (current.full_backup_on_error)
Expand Down
7 changes: 3 additions & 4 deletions catalog.c
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Original file line number Diff line number Diff line change
Expand Up @@ -266,7 +266,7 @@ catalog_get_backup_list(const pgBackupRange *range)
* Find the last completed database full valid backup from the backup list.
*/
pgBackup *
catalog_get_last_full_backup(parray *backup_list)
catalog_get_last_data_backup(parray *backup_list)
{
int i;
pgBackup *backup = NULL;
Expand All @@ -276,9 +276,8 @@ catalog_get_last_full_backup(parray *backup_list)
{
backup = (pgBackup *) parray_get(backup_list, i);

/* Return the first full valid backup. */
if (backup->backup_mode == BACKUP_MODE_FULL &&
backup->status == BACKUP_STATUS_OK)
/* we need completed database backup */
if (backup -> status == BACKUP_STATUS_OK && HAVE_DATABASE(backup))
return backup;
}

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16 changes: 12 additions & 4 deletions expected/backup.out
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Original file line number Diff line number Diff line change
Expand Up @@ -16,15 +16,23 @@
0
1
###### BACKUP COMMAND TEST-0005 ######
###### Make sure that pg_rman does not take a differential backup, but a incremental backup ######
0
CREATE TABLE
INSERT 0 1000000
0
0
INCR 16kB OK
###### BACKUP COMMAND TEST-0006 ######
###### full backup with compression ######
0
1
1
###### BACKUP COMMAND TEST-0006 ######
###### BACKUP COMMAND TEST-0007 ######
###### full backup with smooth checkpoint ######
0
1
###### BACKUP COMMAND TEST-0007 ######
###### BACKUP COMMAND TEST-0008 ######
###### switch backup mode from incremental to full ######
incremental backup without validated full backup
INFO: copying database files
Expand All @@ -43,7 +51,7 @@ INFO: Please execute 'pg_rman validate' to verify the files are correctly copied
0
1
1
###### BACKUP COMMAND TEST-0008 ######
###### BACKUP COMMAND TEST-0009 ######
###### switch backup mode from archive to full ######
archive backup without validated full backup
ERROR: cannot take an incremental backup
Expand All @@ -61,7 +69,7 @@ INFO: Please execute 'pg_rman validate' to verify the files are correctly copied
0
1
1
###### BACKUP COMMAND TEST-0009 ######
###### BACKUP COMMAND TEST-0010 ######
###### failure in backup with different system identifier database ######
ERROR: could not start backup
DETAIL: system identifier of target database is different from the one of initially configured database
Expand Down
2 changes: 1 addition & 1 deletion pg_rman.h
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Original file line number Diff line number Diff line change
Expand Up @@ -285,7 +285,7 @@ extern void pgBackupValidate(pgBackup *backup, bool size_only, bool for_get_time
/* in catalog.c */
extern pgBackup *catalog_get_backup(time_t timestamp);
extern parray *catalog_get_backup_list(const pgBackupRange *range);
extern pgBackup *catalog_get_last_full_backup(parray *backup_list);
extern pgBackup *catalog_get_last_data_backup(parray *backup_list);
extern pgBackup *catalog_get_last_arclog_backup(parray *backup_list);
extern pgBackup *catalog_get_last_srvlog_backup(parray *backup_list);

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25 changes: 20 additions & 5 deletions sql/backup.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -118,7 +118,6 @@ pg_rman validate -B ${BACKUP_PATH} --quiet
pg_rman show detail -B ${BACKUP_PATH} > ${TEST_BASE}/TEST-0001.log 2>&1
grep -c OK ${TEST_BASE}/TEST-0001.log


echo '###### BACKUP COMMAND TEST-0002 ######'
echo '###### incremental backup mode ######'
pg_rman backup -B ${BACKUP_PATH} -b incremental -p ${TEST_PGPORT} -d postgres --quiet;echo $?
Expand All @@ -141,7 +140,23 @@ pg_rman validate -B ${BACKUP_PATH} --quiet
pg_rman show detail -B ${BACKUP_PATH} > ${TEST_BASE}/TEST-0004.log 2>&1
grep -c OK ${TEST_BASE}/TEST-0004.log

# If a differential backup was taken, the size of third backup is same as the second one and the size is bigger (XXMB).
# 16kB is the base backup size if nothing was changed in the database cluster.
echo '###### BACKUP COMMAND TEST-0005 ######'
echo '###### Make sure that pg_rman does not take a differential backup, but a incremental backup ######'
init_catalog
pg_rman backup -B ${BACKUP_PATH} -b full -p ${TEST_PGPORT} -d postgres --quiet;echo $?
pg_rman validate -B ${BACKUP_PATH} --quiet
psql -p ${TEST_PGPORT} -d postgres -c 'create table test (c1 int);'
psql -p ${TEST_PGPORT} -d postgres -c 'insert into test values(generate_series(1,1000000));'
pg_rman backup -B ${BACKUP_PATH} -b incremental -p ${TEST_PGPORT} -d postgres --quiet;echo $?
pg_rman validate -B ${BACKUP_PATH} --quiet
pg_rman backup -B ${BACKUP_PATH} -b incremental -p ${TEST_PGPORT} -d postgres --quiet;echo $?
pg_rman validate -B ${BACKUP_PATH} --quiet
pg_rman show detail -B ${BACKUP_PATH} > ${TEST_BASE}/TEST-0012.log 2>&1
cat ${TEST_BASE}/TEST-0012.log | head -n 4 | tail -n 1 | awk '{print $5, $6, $13}'

echo '###### BACKUP COMMAND TEST-0006 ######'
echo '###### full backup with compression ######'
init_catalog
pg_rman backup -B ${BACKUP_PATH} -b full -s -Z -p ${TEST_PGPORT} -d postgres --quiet;echo $?
Expand All @@ -150,15 +165,15 @@ pg_rman show detail -B ${BACKUP_PATH} > ${TEST_BASE}/TEST-0005.log 2>&1
grep -c OK ${TEST_BASE}/TEST-0005.log
grep OK ${TEST_BASE}/TEST-0005.log | grep -c true

echo '###### BACKUP COMMAND TEST-0006 ######'
echo '###### BACKUP COMMAND TEST-0007 ######'
echo '###### full backup with smooth checkpoint ######'
init_catalog
pg_rman backup -B ${BACKUP_PATH} -b full -s -C -p ${TEST_PGPORT} -d postgres --quiet;echo $?
pg_rman validate -B ${BACKUP_PATH} --quiet
pg_rman show detail -B ${BACKUP_PATH} > ${TEST_BASE}/TEST-0006.log 2>&1
grep -c OK ${TEST_BASE}/TEST-0006.log

echo '###### BACKUP COMMAND TEST-0007 ######'
echo '###### BACKUP COMMAND TEST-0008 ######'
echo '###### switch backup mode from incremental to full ######'
init_catalog
echo 'incremental backup without validated full backup'
Expand All @@ -171,7 +186,7 @@ pg_rman show detail -B ${BACKUP_PATH} > ${TEST_BASE}/TEST-0010.log 2>&1
grep OK ${TEST_BASE}/TEST-0010.log | grep FULL | wc -l
grep ERROR ${TEST_BASE}/TEST-0010.log | grep INCR | wc -l

echo '###### BACKUP COMMAND TEST-0008 ######'
echo '###### BACKUP COMMAND TEST-0009 ######'
echo '###### switch backup mode from archive to full ######'
init_catalog
echo 'archive backup without validated full backup'
Expand All @@ -184,7 +199,7 @@ pg_rman show detail -B ${BACKUP_PATH} > ${TEST_BASE}/TEST-0011.log 2>&1
grep OK ${TEST_BASE}/TEST-0011.log | grep FULL | wc -l
grep ERROR ${TEST_BASE}/TEST-0011.log | grep ARCH | wc -l

echo '###### BACKUP COMMAND TEST-0009 ######'
echo '###### BACKUP COMMAND TEST-0010 ######'
echo '###### failure in backup with different system identifier database ######'
init_catalog
pg_ctl stop -m immediate > /dev/null 2>&1
Expand Down

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