Re: How to do hot backup using postgres

I tried to do pitr backup using Postgres 8.3.9 on windows. So I issued SELECT pg_start_backup('test');
After I put the db in backup mode I tried to zip the data directory files with 7z. However I encountered the following errors:

The process cannot access the file because it is being used by another process.
C:\...\8.3\data\global1214
The process cannot access the file because it is being used by another process.
C:\...\8.3\pg_xlog\00000001000000070000001B
...
...
But zip file was created.
Is it error ? How can I zip the files and perform a hot backup on windows?