Re: WIP/PoC for parallel backup

Hi Asif,

Thanks for new patches.

Patches need to be rebased on head. Getting a failure while applying the 0003 patch.

edb@localhost postgresql]$ git apply  v11/0003-Parallel-Backup-Backend-Replication-commands.patch
error: patch failed: src/backend/storage/ipc/ipci.c:147
error: src/backend/storage/ipc/ipci.c: patch does not apply

I have applied v11 patches on commit - 23ba3b5ee278847e4fad913b80950edb2838fd35 to test further.

pg_basebackup has a new option "--no-estimate-size",  pg_basebackup crashes when using this option.

[edb@localhost bin]$ ./pg_basebackup -D /tmp/bkp --no-estimate-size --jobs=2
Segmentation fault (core dumped)

--stacktrace

[edb@localhost bin]$ gdb -q -c core.80438 pg_basebackup
Loaded symbols for /lib64/libselinux.so.1
Core was generated by `./pg_basebackup -D /tmp/bkp --no-estimate-size --jobs=2'.
Program terminated with signal 11, Segmentation fault.
#0  ____strtol_l_internal (nptr=0x0, endptr=0x0, base=10, group=<value optimized out>, loc=0x392158ee40) at ../stdlib/strtol_l.c:298
298  while (ISSPACE (*s))
Missing separate debuginfos, use: debuginfo-install keyutils-libs-1.4-5.el6.x86_64 krb5-libs-1.10.3-65.el6.x86_64 libcom_err-1.41.12-24.el6.x86_64 libselinux-2.0.94-7.el6.x86_64 openssl-1.0.1e-58.el6_10.x86_64 zlib-1.2.3-29.el6.x86_64
(gdb) bt
#0  ____strtol_l_internal (nptr=0x0, endptr=0x0, base=10, group=<value optimized out>, loc=0x392158ee40) at ../stdlib/strtol_l.c:298
#1  0x0000003921233b30 in atoi (nptr=<value optimized out>) at atoi.c:28
#2  0x000000000040841e in main (argc=5, argv=0x7ffeaa6fb968) at pg_basebackup.c:2526