[CentOS] Convert "bare partition" to RAID1 / mdadm?

[Cliff Pratt]

>
>
> On Tue, Jul 29, 2014 at 1:25 AM, John Doe <jdmls at yahoo.com> wrote:
>
> > From: Benjamin Smith <lists at benjamindsmith.com>
> >
> > > Thanks for your feedback - it's advice I would have given myself just a
> > > few years ago. We have *literally* in the range of one hundred million
> > > small PDF documents. The simple command
> > >
> > > find /path/to/data > /dev/null
> > >
> > > takes between 1 and 2 days, system load depending. We had to give up on
> > > rsync for backups in this context a while ago - we just couldn't get a
> > > "daily" backup more often then about 2x per week.
> >
> > What about:
> > 1. Setup inotify (no idea how it would behave with your millions of
> files)
> >
> > 2. One big rsync
> > 3. Bring it down and copy the few modified files reported by inotify.
> >
> > Or lsyncd?
> >
> >
> On Tue, Jul 29, 2014 at 12:02 PM, Cliff Pratt <enkiduonthenet at gmail.com>
>  wrote:
>
>> rsync breaks silently or sometimes noisily on big directory/file
>> structures. It depends on how the OP's files are distributed. We organised
>> our files in a client/year/month/day and run a number of rsyncs on
>> separate
>> parts of the hierarchy. Older stuff doesn't need to be rsynced but gets
>> backed up every so often.
>>
>> But it depends whether or not the OP's data is arranged so that he could
>> do
>> something like that.
>>
>> Cheers,
>>
>> Cliff
>>
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