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Hi Keath,
If my NetBackup DataCentre 3.4.1 "Media List" report is to be believed, I am
getting well over the "100Gigs native, 200 Gigs compressed" figure on many
of my LTO tapes:
# images Kbytes
104 202,714,503
132 257,023,042
230 347,272,125
311 450,957,639
So far we have not had any issues with our restores either. According to
Advanced Reporter with our 9840 media backing up the same data we were
averaging a 2:1 ratio (about 40Gig per tape). Obviously we are getting a far
greater ratio with our new tape LTO tape drives and Ultrium (Fujifilm)
tapes.
Grant
Transport Canada
BTW - What sort of throughput are you getting ? Obviously it varies with how
much data and what type of data you are able to stream to the drive at any
one point in time, but what are your averages? According to Advanced
Reporter our maximum throughput averages about 25Megs/second with spikes up
to 55megs/second.
-----Original Message-----
From: Marx, Keath [mailto:kmarx AT trigon DOT com]
Sent: Tuesday, August 27, 2002 8:59 AM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Better than 2:1 on LTO???
Greetings All,
I just started backing up a large clustered file server. Up until this
point we had been backing up system state on AD controllers and exchange2k
servers and the exchange databases. The most that has fit on a tape up to
this point has been about 180 Gig according to Netbackup. We added the
cluster which holds about 650 Gig of data. According to Netbackup, we have
as much as 264 Gig of data on a single tape. The data on this machine
varies from home directories with the normal stuff stored to departmental
shares with anything and everything. I do know there are a quite a few
access MDBs and plenty of large SQL flat file dumps. I have tested restores
of random directories so it looks like I am getting good backups.
Is it feasible that I am getting better than 2:1 on some of this data?
BM__MailAutoSigThanks.
_____________________________________
< <mailto:kmarx AT trigon DOT com> kmarx AT trigon DOT com>
Tel: 804-354-3282 / Fax 804-354-7839
Cell Phone 804-513-1431
This message, including files attached to it, may contain confidential
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<TITLE>Better than 2:1 on LTO???</TITLE>
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<DIV><SPAN class=3D484484720-28082002><FONT face=3DArial =
color=3D#0000ff size=3D2>Hi=20
Keath,</FONT></SPAN></DIV>
<DIV><SPAN class=3D484484720-28082002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D484484720-28082002><FONT face=3DArial =
color=3D#0000ff size=3D2>If my=20
NetBackup DataCentre 3.4.1 "Media List" report is to be believed, I am =
getting=20
well over the "100Gigs native, 200 Gigs compressed" figure on many of =
my LTO=20
tapes:</FONT></SPAN></DIV>
<DIV><SPAN class=3D484484720-28082002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D484484720-28082002><FONT face=3DArial =
color=3D#0000ff size=3D2>#=20
images =20
Kbytes</FONT></SPAN></DIV>
<DIV><SPAN class=3D484484720-28082002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>104 =
=20
202,714,503</FONT></SPAN></DIV>
<DIV><SPAN class=3D484484720-28082002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>132 =
=20
257,023,042</FONT></SPAN></DIV>
<DIV><SPAN class=3D484484720-28082002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>230 =
347,272,125</FONT></SPAN=
></DIV>
<DIV><SPAN class=3D484484720-28082002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>311 =
=20
450,957,639</FONT></SPAN></DIV>
<DIV><SPAN class=3D484484720-28082002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D484484720-28082002><FONT face=3DArial =
color=3D#0000ff size=3D2>So far=20
we have not had any issues with our restores either. According to =
Advanced=20
Reporter with our 9840 media backing up the same data we were =
averaging a=20
2:1 ratio (about 40Gig per tape). Obviously we are getting a far =
greater ratio=20
with our new tape LTO tape drives and Ultrium (Fujifilm) tapes. =20
</FONT></SPAN></DIV>
<DIV><SPAN class=3D484484720-28082002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D484484720-28082002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>Grant</FONT></SPAN></DIV>
<DIV><SPAN class=3D484484720-28082002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>Transport Canada</FONT></SPAN></DIV>
<DIV><SPAN class=3D484484720-28082002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D484484720-28082002><FONT face=3DArial =
color=3D#0000ff size=3D2>BTW -=20
What sort of throughput are you getting ? Obviously it varies with how =
much data=20
and what type of data you are able to stream to the drive at any one =
point in=20
time, but what are your averages? According to Advanced Reporter our =
maximum=20
throughput averages about 25Megs/second with spikes up to =
55megs/second.=20
</FONT></SPAN></DIV>
<DIV><SPAN class=3D484484720-28082002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D484484720-28082002><FONT face=3DTahoma =
size=3D2></FONT></SPAN><FONT=20
face=3DTahoma><FONT size=3D2><SPAN=20
class=3D484484720-28082002></SPAN></FONT> </DIV>
<DIV><FONT size=3D2><SPAN =
class=3D484484720-28082002> </SPAN>-----Original=20
Message-----<BR><B>From:</B> Marx, Keath=20
[mailto:kmarx AT trigon DOT com]<BR><B>Sent:</B> Tuesday, August 27, 2002 8:59 =
AM<BR><B>To:</B> veritas-bu AT mailman.eng.auburn DOT edu<BR><B>Subject:</B>=20
[Veritas-bu] Better than 2:1 on LTO???<BR><BR></DIV></FONT></FONT>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
<P align=3Dleft><FONT face=3DArial size=3D2>Greetings All,</FONT></P>
<P align=3Dleft><FONT face=3DArial size=3D2>I just started backing up =
a large=20
clustered file server. </FONT> <FONT face=3DArial size=3D2>Up =
until this=20
point we had been backing up system state on AD controllers and =
exchange2k=20
servers and t</FONT><FONT face=3DArial size=3D2>he exchange=20
databases.</FONT> <FONT face=3DArial size=3D2> The most that has =
fit on a=20
tape up to this point has been about 180 Gig according to</FONT> =
<FONT=20
face=3DArial size=3D2>Netbackup</FONT><FONT face=3DArial =
size=3D2>.</FONT><FONT=20
face=3DArial size=3D2> We added the cluster which holds about =
650 Gig of=20
data.</FONT> <FONT face=3DArial size=3D2></FONT> <FONT =
face=3DArial=20
size=3D2>A</FONT><FONT face=3DArial size=3D2>ccording</FONT> <FONT =
face=3DArial=20
size=3D2>to Netbackup, we have as much as 264 Gig of data on a single =
tape.</FONT> <FONT face=3DArial size=3D2> The data on this =
machine=20
vari</FONT><FONT face=3DArial size=3D2>es from home directories with =
the normal=20
stuff stored to departmental shares with anything and=20
everything.</FONT> <FONT face=3DArial size=3D2> I do know there =
are a quite a=20
few access MDBs an</FONT><FONT face=3DArial size=3D2>d plenty of =
large SQL flat=20
file dumps.</FONT> <FONT face=3DArial size=3D2> I have tested =
restores of=20
random di</FONT><FONT face=3DArial size=3D2>rectories so it looks =
like I am=20
getting</FONT> <FONT face=3DArial size=3D2>good backups.</FONT></P>
<P align=3Dleft><FONT face=3DArial size=3D2>Is it feasible that I am =
getting better=20
than 2:1 on some of this data?</FONT><FONT face=3DArial =
size=3D2> </FONT>=20
</P>
<P align=3Dleft><A name=3D_MailAutoSig><FONT face=3DArial=20
size=3D2>Thanks.</FONT></A></P>
<P align=3Dleft><FONT face=3DTahoma=20
size=3D1>_____________________________________</FONT></P>
<P align=3Dleft><FONT face=3DTahoma color=3D#0000ff =
size=3D1><</FONT><A=20
href=3D"mailto:kmarx AT trigon DOT com"><U></U><U><FONT face=3DTahoma =
color=3D#0000ff=20
size=3D1>kmarx AT trigon DOT com</FONT></U></A><FONT face=3DTahoma =
color=3D#0000ff=20
size=3D1>></FONT></P>
<P align=3Dleft><FONT face=3DTahoma color=3D#000000 size=3D1>Tel: =
804-354-3282 / Fax=20
804-354-7839</FONT></P>
<P align=3Dleft><FONT face=3DTahoma color=3D#000000 size=3D1>Cell =
Phone=20
804-513-1431</FONT></P>
<P align=3Dleft><FONT face=3D"Comic Sans MS" color=3D#000000 =
size=3D1>This message,=20
including files attached to it, may contain confidential information =
that is=20
intended only for the use of the ADDRESSEE(S) named above. If =
you are=20
not an intended recipient, you are hereby notified that any =
dissemination or=20
copying of the i</FONT><FONT face=3D"Comic Sans MS" color=3D#000000=20
size=3D1>n</FONT><FONT face=3D"Comic Sans MS" color=3D#000000 =
size=3D1>formation=20
contained in this message, or the taking of any action in reliance =
upon the=20
information, is strictly prohibited. If you have received this =
message=20
in error, please notify the sender immediately and delete the message =
from=20
your system. Thank yo</FONT><FONT face=3D"Comic Sans MS" =
color=3D#000000=20
size=3D1>u</FONT><FONT face=3D"Comic Sans MS" color=3D#000000 =
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