an error back through
the dsl_read() of the log block.
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On 02/09/2010 11:18, Zhu Han wrote:
Can anybody help me give the link on the code snippet of block size
estimation?
See the zfs_write() function.
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. The L2ARC cache devices are purely caches
there is NEVER data on them that isn't already in the main pool devices.
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poolname
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a step back and ask
why are you even worried about fragmentation ? do you know you have a
pool that is fragmented? is it actually causing you a performance
problem?
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create tank
zfs set dedup=on tank
zfs create tank/1
zfs create tank/1/1
zfs create tank/2
zfs create -o dedup=off tank/2/2
zfs create tank/2/2/3
In this case all datasets in the pool will participate in deduplication
with the exception of tank/2/2 and its decendents.
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destroy -d' were designed
for. When using 'zfs send' holds will automatically be taken out for
pool versions 18 and higher.
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differences are:
zfs umount will do all these things that /usr/bin/umount won't do:
* It can be applied recursively down a ZFS hierarchy
* It will unshare the filesystems first
Both ultimately just call umount2(2)
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are mirroring.
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but only if there are actually
people actively looking.
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the pool is degraded or not depends on wither you dettach an
existing side of a two way mirror to do the replacement with the larger
drive or if you create a three way mirror first and then dettach one of
the size of the original two way mirror.
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box have the same issue to any other server ?
What if the client box isn't Linux but Solaris or Windows or MacOS X ?
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guarantee that the LUN will not come from the same spindles
on the SAN.
That sounds like a problem with your SAN config if that matters to you.
Can I force zpool to not to stripe the data ?
You can't, but why do you care ?
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0
mirror-1 ONLINE 0 0 0
c7t3d0 ONLINE 0 0 0
c8t4d0 ONLINE 0 0 0
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in this example case isn't
ZFS - on the SAN where the LUNs are getting allocated.
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.
Can you layer vdevs hierarchically? Last time I looked, you couldn't
do that.
You mean like a mirror of raidz or a raidz or mirrors ?
No the admin interface doesn't allow you to do that.
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raidz2 vdev?
There is no support in ZFS for nested vdevs like this.
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it require you not to use
hardware raid. Some of all of which are impossible if you are using SAN
or other remote block storage devices in many cases - and certainly the
case if the SAN is provided by a Sun ZFS Storage appliance.
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Yes, ZVOLs do use the ZIL.
If the write cache has been disabled on the zvol by the DKIOCSETWCE
ioctl or the sync property is set to always.
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results in DKIOCGETWCE ioctl being called on
the ZVOL (though you won't see that in truss because it is called from
the comstar kernel modules not directly from stmfadm in userland).
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#zfs_ioc_vdev_split
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because I'm not going to disclose it here in case it is miss used.
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On 11/15/10 19:36, David Magda wrote:
On Mon, November 15, 2010 14:14, Darren J Moffat wrote:
Today Oracle Solaris 11 Express was released and is available for
download[1], this release includes on disk encryption support for ZFS.
Using ZFS encryption support can be as easy
there is on one correct way to write files onto persistent media.
Choice is important and sometimes choosing more than one is the correct
thing to do.
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is the
correct thing to do.
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Express
into a production environment.
[1]
http://www.oracle.com/technetwork/server-storage/solaris11/overview/faqs-oraclesolaris11express-185609.pdf
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/compress_encrypt_checksum_deduplicate_with
Is there a URL describing the on-disk format and implementation details?
It is a work in progress.
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For changing the encryption key see the discussion of 'zfs key -K' in
the zfs(1M) man page:
http://docs.sun.com/app/docs/doc/821-1462/zfs-1m?l=ena=view
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On 19/11/2010 00:39, David Magda wrote:
On Nov 16, 2010, at 05:09, Darren J Moffat wrote:
Both CCM[1] and GCM[2] are provided so that if one turns out to have
flaws hopefully the other will still be available for use safely even
though they are roughly similar styles of modes.
On systems
of the cryptography
design were also discussed on other archived public forums as well as
zfs-crypto-discuss.
The design was also presented at IEEE 1619 SISWG and at SNIA.
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, but obviously you lose your snapshot history that way.
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system you could
have just forced the import.
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On 01/12/2010 13:36, f...@ll wrote:
I must send zfs snaphost from one server to another. Snapshot have size
130GB. Now I have question, the zfs have any limit of sending file?
No.
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-discuss).
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necessary for the on disk
format are in the CTF data of the binaries.
http://blogs.sun.com/darren/entry/zfs_encryption_what_is_on
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with these resources:
Oracle Solaris 11 Express Trusted Extensions Collection
http://docs.sun.com/app/docs/coll/2580.1?l=en
OpenSolaris Security Community pages on TX:
http://hub.opensolaris.org/bin/view/Community+Group+security/tx
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.
$ ppriv -e -s EPIL=basic,!file_write myapp
If it is being started by an SMF service you can remove file_write in
the method_credential section - see smf_method(5).
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of the problem.
Another alternative to try would be setting primarycache=metadata on the
ZFS dataset that contains the mmap files. That way you are only turning
of the ZFS ARC cache of the file content for that one dataset rather
than clamping the ARC.
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those optimistations for floating point don't come into play for ZFS
encryption.
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/zfs_encryption_what_is_on where I
explain all the type of keys used and how they are generated as well as
how passphrases are turned into AES wrapping keys (using PKCS#5 PBE).
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http
/onnv/onnv-gate/usr/src/common/bignum/sun4u/
Note that there are separate kernel and user land variants of that.
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that aren't Sun hardware as well as
servers.
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due to very
early boot issues.
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On 07/01/2011 11:56, Sašo Kiselkov wrote:
On 01/07/2011 10:26 AM, Darren J Moffat wrote:
On 06/01/2011 23:07, David Magda wrote:
On Jan 6, 2011, at 15:57, Nicolas Williams wrote:
Fletcher is faster than SHA-256, so I think that must be what you're
asking about: can Fletcher+Verification
to work with at least the following
backup applications:
• Oracle Secure Backup 10.3.0.2 and above
• Enterprise Backup Software (EBS) / Legato Networker 7.5 and above
• Symantec NetBackup 6.5.3 and above
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zfs
if 'foo' was quarantined.
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script is
find/ls/grep. You could write a C program that uses the same method
that ls does to get the attributes but you will still have to visit
every file in the file system.
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on delegated datasets ? Doing this for the
global zone is a little harder but for a local zone it can be done by
extending the 'zfs allow' mechanism.
See:
http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=7011365
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appliances.
They may be storage appliances, but the user can not put their own
software on them. This limits the appliance to only the features that
Oracle decides to put on it.
Isn't that the very definition of an Appliance ?
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access would just be a totally
useless brick).
As an engineer I'm curious have you actually tried a suitably sized
S7000 or are you assuming it won't perform suitably for you ?
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are a filesystem level
concept that is understood my many filesystems including CIFS and ZFS
and many others.
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://download.oracle.com/docs/cd/E19963-01/html/821-1462/ndmpd-1m.html
http://download.oracle.com/docs/cd/E19963-01/html/821-1462/ndmpstat-1m.html
What you mean by supporting it ?
I believe (though I haven't tested it) it works with Oracle Secure
Backup as well as NetBackup and Networker.
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systems support contract with Oracle you should
be able to log a support ticket and request a backport of the fix for CR
6989185.
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good.
Not recommended by who ? Which documentation says this ?
As I pointed out last time this came up the NDMP service on Solaris 11
Express and on the Oracle ZFS Storage Appliance uses the 'zfs send'
stream as what is to be stored on the tape.
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but at the ZPL layer that is multiple write(2) calls
and maybe even some rename(2)/unlink(2)/close(2) calls as well.
If you move further down then doing a snapshot on every dmu_write() call
is fundamentally at odds with how ZFS works.
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about any specific issue here but about the way
your conclusion was written it doesn't follow that because the pool and
version number are the same that no zfs/zpool/dedup code was changed.
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make it slower.
I removed the separate log device from both of those pools (by manual
hacking with specially build zfs kernel modules because slog removal
didn't exist back then.).
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layer concept - ie below the DMU layer.
There is nothing in the send stream format that knows what an ashift
actually is.
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is.
But basically it is not provided by ZFS itself it is up to the person
building the system to secure the transport layer used for ZFS send.
It could also be write directly to a T10k encrypting tape drive.
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does update-in-place and UFS only does update-in-place for
Note quite never, there are some very special cases where blocks are
allocated ahead of time and could be written to in place more than
once. In particular the special type of ZVOLs used for dump devices.
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node(Solaris) needs extra software, is it correct?
I believe so, also it is more than just the T1C drive you need it
needs to be in a library and you also need the Oracle Key Management
system to be able to do the key management for it.
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traffic encryption.
Indeed, plus you don't necessarily want to always have your backups
encrypted by the same keys as the live data (ie the policy for key
management and retention could be different on purpose).
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it to filesystems
other than rpool. Which feels kludgy. Is there a better way?
echo set zfs:zil_disable = 1 /etc/system
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name of 'myrole' and a ZFS pool called 'tank' it would
be something like this:
# roleadd -R myrole
# passwd myrole
...
# useradd -R myrole cephas
# zfs allow -u myrole send,receive,snapshot,mount tank
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.
Note the following is an implementation detail subject to change:
It is NOT checksumed on disk only in memory, but the L2ARC data on disk
is not used after reboot anyway just now.
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. Can
anybody confirm?.
Of course if we didn't do that we would be leaking user data.
2. What happens with L2ARC?. Since ARC is not encrypted (in RAM), is
it encrypted when evicted to L2ARC?.
Use of the L2ARC is disabled for data from encrypted datasets at this time.
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service properties.
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to be in
the clear.
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On 10/13/11 09:27, Fajar A. Nugraha wrote:
On Tue, Oct 11, 2011 at 5:26 PM, Darren J Moffat
darr...@opensolaris.org wrote:
Have you looked at the time-slider functionality that is already in Solaris
?
Hi Darren. Is it available for Solaris 10? I just installed Solaris 10
u10 and couldn't
adaptors at the time
too.
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/fs/zfs/metaslab.c
See lines 1356-1378
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On 10/18/11 14:04, Jim Klimov wrote:
2011-10-18 16:26, Darren J Moffat пишет:
On 10/18/11 13:18, Edward Ned Harvey wrote:
* btrfs is able to balance. (after adding new blank devices,
rebalance, so
the data workload are distributed across all the devices.) zfs is not
able to do this yet.
ZFS
with 2. ALWAYS let ZFS manage the redundancy otherwise it can't
self-heal.
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be received on systems that do not
support the stream deduplication feature.
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not familiar with how FreeBSD is installed and boots can
you explain how boot works (ie do you use GRUB at all and if so which
version and where the early boot ZFS code is).
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have some deduplication support, it can import and read
datasets in a deduped pool just fine. You can't enable dedup on a
dataset and any writes won't dedup they will rehydrate.
So it is more like partial dedup support rather than it not being there
at all.
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pool devices) go for a given
dataset are determined by a combination of things including (but not
limited to) the presence of a SLOG device, the logbias property and the
size of the data.
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Import the pool without mounting any file systems.
If it isn't mounted it can't be shared.
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already.
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is important here is understanding where the encryption and
keysource properties are set and where they are inherited.
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this means is that even though you have the same passphrase for
each dataset the actual data encryption key is different because the
passphrase value plus the hidden salt property are used together to
generated the wrapping key.
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On 02/21/12 13:27, Edward Ned Harvey wrote:
From: Darren J Moffat [mailto:darr...@opensolaris.org]
Sent: Monday, February 20, 2012 12:46 PM
GRUB2 has support
for encrypted ZFS file systems already.
I assume this requires a pre-boot password, right? Then I have two
questions...
The ZFS
, see zfs
key.
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the check that 'zfs inherit' does
so I can get out of the situation and make the datasets accessible
again. So this is fixable so don't abandon hope yet.
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.
For IO depends what level you want to look at, if it is the device level
iostat, if it is how ZFS is using the devices look at 'zpool iostat'.
If it is the filesystem level look at fsstat.
Also look acctadm(1M).
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but there is another (readonly) implementation of ZFS
encryption:
http://bazaar.launchpad.net/~vcs-imports/grub/grub2-bzr/view/head:/grub-core/fs/zfs/zfscrypt.c
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On 04/30/12 04:00, Fred Liu wrote:
The subject says it all.
Still a fully supported product from Oracle:
http://www.oracle.com/us/products/servers-storage/storage/storage-software/qfs-software/overview/index.html
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-tying.
If you want to know Oracle's roadmap for SAM-QFS then I recommend
contacting your Oracle account rep rather than asking on a ZFS
discussion list. You won't get SAM-QFS or Oracle roadmap answers from
this alias.
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if there is an effort to integrate open-sourced
SAM-QFS into illumos
or smartos/oi/illumian.
Okay, then it would have been clearer if you had asked that question but
you asked about SAM-QFS on a zfs discuss alias.
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zfs
.
No ZFS checksums are over the data as it is stored on disk so the
compressed data.
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NIST
name of that hash.
With the internal enum being: ZIO_CHECKSUM_SHA512_256
CR 7020616 already exists for adding this in Oracle Solaris.
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more importantly ZFS does not preclude the need for
off system backups. Even with mirroring, and snaphots you still have to
have a backup of important data elsewhere. No file system and more
importantly no hardware is that good.
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simply wrong?
Initially there wouldn't have been.
Are you doing the zfs send on your own or letting time-slider do it for
you ?
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the highest version supported by the running software.
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