Date: Thu, 6 Aug 2020 19:21:28 +0000 (UTC) From: Paul Pathiakis <pathiaki2@yahoo.com> To: Jacques Foucry <jacques+freebsd@foucry.net>, Polytropon <freebsd@edvax.de> Cc: freebsd-questions@freebsd.org Subject: Re: Question re ZFS with mixed drive speeds & types Message-ID: <1535400648.1041648.1596741688161@mail.yahoo.com> In-Reply-To: <20200805204546.d1bf410e.freebsd@edvax.de> References: <575C4647-8F20-4187-9B74-2D509D31A249@gmail.com> <4fefedad-5b2a-11b8-7b22-3b6162f0404f@holgerdanske.com> <20200805182636.GD48435@mithril> <20200805204546.d1bf410e.freebsd@edvax.de>
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Wow.... someone as old as me... :)
I had no idea.=C2=A0 I remember a lot of those applications in an OS that w=
ere based on this theory.=C2=A0 I believe there were even a few that indexe=
d tape drives with UNIX i-nodes.=C2=A0 Good times..... :)
P.
On Wednesday, August 5, 2020, 2:46:06 PM EDT, Polytropon <freebsd@edvax=
.de> wrote: =20
=20
On Wed, 5 Aug 2020 20:26:36 +0200, Jacques Foucry wrote:
> Le mercredi 05 ao=C3=BBt 2020 =C3=A0 01:32:02 (-0700), David Christensen =
=C3=A0 =C3=A9crit:
> > On 2020-08-04 23:55, Greg Marsh wrote:
> > > [...]
> > > I ask because about 10 years ago, I was involved in a project that ha=
d a HUGE storage component. Many of the vendors we brought in to pitch, inc=
luding Sun, were promoting tiered storage. Sun in particular were quite pro=
ud of this tech. Their system ran ZFS and had a hybrid of ssd, sas & SATA, =
with the system dynamically moving data around the different speed/capacity=
drives, based on their activity, all transparent to the application or use=
r. Most often used data coming from the ssd & sas drives, with less active =
files kept on the SATA drives.
>=20
>=20
> I remember the same thing when Sun demostrate us ZFS (I was a Sunkskill a=
t
> this time). But I never tried.
Sounds a bit like HSM - hierarchical storage management,
implemented on IBM mainframe systems (DFHSM) and on
DEC VMS for VAX and Alpha, also has been implemented
on AIX and other UNIX operating systems.
So decades old stuff is "new" again... ;-)
--=20
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...
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Subject: Re: Question re ZFS with mixed drive speeds & types
From: Greg Marsh <greg.marsh@gmail.com>
X-Mailer: iPhone Mail (16G183)
In-Reply-To: <1535400648.1041648.1596741688161@mail.yahoo.com>
Date: Thu, 6 Aug 2020 16:32:55 -0400
Cc: Jacques Foucry <jacques+freebsd@foucry.net>,
Polytropon <freebsd@edvax.de>, freebsd-questions@freebsd.org
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References: <575C4647-8F20-4187-9B74-2D509D31A249@gmail.com>
<4fefedad-5b2a-11b8-7b22-3b6162f0404f@holgerdanske.com>
<20200805182636.GD48435@mithril> <20200805204546.d1bf410e.freebsd@edvax.de>
<1535400648.1041648.1596741688161@mail.yahoo.com>
To: Paul Pathiakis <pathiaki2@yahoo.com>
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Thank you all for your input and memories. I=E2=80=99m glad to hear I=E2=80=99=
m not hallucinating having recalled said storage sales pitches. =3D)
I suspect what I=E2=80=99ll end up doing is migrating my current array to th=
e new system, then experiment with adding mixed drives to a second, testing a=
rray.=20
When I started in IT, it was in a big VAX/Alpha OpenVMS using company. The p=
rogrammers couldn=E2=80=99t stop talking about how lighting fast the RMS fil=
e/record storage system was. I was just an operator at the time.=20
But, when I saw the circulation system (I worked at a newspaper) move from a=
single Alpha 233 to a dual 2 GHz Xeon running Linux and ProgressDB move waa=
aay slower, was I convinced there had to be better ways.=20
To be fair, I generally blame the crappy off the shelf program that replaced=
a decades old, in house developed one.
Cheers,
Greg
Sent from my iPhone
> On Aug 6, 2020, at 15:21, Paul Pathiakis via freebsd-questions <freebsd-qu=
estions@freebsd.org> wrote:
>=20
> Wow.... someone as old as me... :)
> I had no idea. I remember a lot of those applications in an OS that were b=
ased on this theory. I believe there were even a few that indexed tape driv=
es with UNIX i-nodes. Good times..... :)
> P.
>=20
> On Wednesday, August 5, 2020, 2:46:06 PM EDT, Polytropon <freebsd@edvax=
.de> wrote: =20
>=20
> On Wed, 5 Aug 2020 20:26:36 +0200, Jacques Foucry wrote:
>> Le mercredi 05 ao=C3=BBt 2020 =C3=A0 01:32:02 (-0700), David Christensen =C3=
=A0 =C3=A9crit:
>>> On 2020-08-04 23:55, Greg Marsh wrote:
>>>> [...]
>>>> I ask because about 10 years ago, I was involved in a project that had a=
HUGE storage component. Many of the vendors we brought in to pitch, includi=
ng Sun, were promoting tiered storage. Sun in particular were quite proud of=
this tech. Their system ran ZFS and had a hybrid of ssd, sas & SATA, with t=
he system dynamically moving data around the different speed/capacity drives=
, based on their activity, all transparent to the application or user. Most o=
ften used data coming from the ssd & sas drives, with less active files kept=
on the SATA drives.
>>=20
>>=20
>> I remember the same thing when Sun demostrate us ZFS (I was a Sunkskill a=
t
>> this time). But I never tried.
>=20
> Sounds a bit like HSM - hierarchical storage management,
> implemented on IBM mainframe systems (DFHSM) and on
> DEC VMS for VAX and Alpha, also has been implemented
> on AIX and other UNIX operating systems.
>=20
> So decades old stuff is "new" again... ;-)
>=20
>=20
>=20
>=20
> --=20
> Polytropon
> Magdeburg, Germany
> Happy FreeBSD user since 4.0
> Andra moi ennepe, Mousa, ...
> _______________________________________________
> freebsd-questions@freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-questions
> To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.or=
g" =20
> _______________________________________________
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