On Sat, Sep 30, 2017 at 8:18 PM, chenhj <chjis...@163.com> wrote: > On 2017-09-30 02:17:54，"Alexander Korotkov" <a.korot...@postgrespro.ru> > wrote: > > > Great. Now code of this patch looks good for me. > However, we forgot about documentation. > > <para> >> The result is equivalent to replacing the target data directory with >> the >> source one. Only changed blocks from relation files are copied; >> all other files are copied in full, including configuration files. The >> advantage of <application>pg_rewind</> over taking a new base backup, >> or >> tools like <application>rsync</>, is that <application>pg_rewind</> >> does >> not require reading through unchanged blocks in the cluster. This makes >> it a lot faster when the database is large and only a small >> fraction of blocks differ between the clusters. >> </para> > > > At least, this paragraph need to be adjusted, because it states whose > files are copied. And probably latter paragraphs whose state about WAL > files. > > > > Your are rigth. > I wrote a draft as following, but i'm afraid whether the english statement > is accurate. >
I'm not native english speaker too :( Only the WAL files between the point of divergence and the current WAL > insert location of the source server are copied, *for* other WAL files are > useless for the target server. I'm not sure about this usage of word *for*. For me, it probably should be just removed. Rest of changes looks good for me. Please, integrate them into the patch. ------ Alexander Korotkov Postgres Professional: http://www.postgrespro.com The Russian Postgres Company
