At 01:25 PM 6/12/02 +0100, you wrote:
>Hi,
>I have been requested to size up a storage system for a news server to
>hold a Full Feed as follows :
> 28 days storage of non-binaries
> 3 days storage of binaries
As a rule of thumb 99.9% of the feed is binaries, so the above calculations
is roughly:
3*500gb, 1.5 tb
23*1gb, 23gb
Total 1.5tb
>Assuming that todays Full Feed is 300GB/day, and this will grow to
>500Gb/day by the end of the year, can anyone suggest how much storage
>space will be initially required, and say, how much in 2 years time ?
>(I am aware that Dnews compresses the news so that 300Gb is not actually
>needed to store 300GB of news..)
Dnews doesn't compress the data, but it can be selective in what it keeps
in such
a way as to greatly reduce how much space you need.
For example if you only keep complete multi part postings that can often double
how much you can keep. And blocking one or two offensive/illegal or
otherwise unwanted
binary groups can also greatly increase how much 'useful' data you can keep.
Also using 3 piles may give you much better retention, e.g.
non binary 30 days
most binaries 10 days
high volume binaries. 2 days
Also, I would not buy disk for the future, disks get cheaper and faster
with time, so buy
them when you need them, just make sure you have somewhere to plug in an extra
one next year if you need it :-)
So I would start with 500-1tb and then do some careful tuning to make the most
of that storage, then see how things go.
Hope that helps, that's my suggestion anyway.
ChrisP.
