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Forum Discussion
RN 104 Free space warnings and (suuurprise) slow iSCSI
Hello everybody, it's me again. again and again I'm coming here with useless and slow RND boxes. now I have RN-104 box with latest firmware 6.7.5 with disabled all services except http. there is 4...
BTRFS uses free space for metadata and snapshots, not just for new files. So it generally does need more free space than ext. Your case is a bit unusual, since you are using iSCSI only.
- What speed do you get with a normal share?
- Do you have checksums enabled in the volume settings?
WingDog wrote:
\...with average HW?....
Well, you did buy the entry-level ReadyNAS. Now the RN214 is the base model, with a faster CPU and much more memory than your RN104.
StephenB wrote:BTRFS uses free space for metadata and snapshots, not just for new files. So it generally does need more free space than ext. Your case is a bit unusual, since you are using iSCSI only.
- What speed do you get with a normal share?
- Do you have checksums enabled in the volume settings?
WingDog wrote:\...with average HW?....
Well, you did buy the entry-level ReadyNAS. Now the RN214 is the base model, with a faster CPU and much more memory than your RN104.
Hi Stephen.
I don't need snapshots. totally. no any snapshot.
My case is not unusual, cause SMB is much worse in RN, so iSCSI is a solution. Else I may need full-disk encryption or teaming (hense NTRG can't archive SMB3 and other multipath). so this is usual case cause NTRG has one OS for all current NAS.
with nornal share I get 35-40MB/sec
no, checksums are not enabled.
doesn't matter when I did buy it. unworkable devices for YEARS (did you remembe me and 4220 with all level supports around it?) - this does matter.
WingDog wrote:
I don't need snapshots. totally. no any snapshot.
Yes I understand that - just saying that the volume warnings need to cover the broader cases (where shares and snapshots are used).
WingDog wrote:
My case is not unusual
I don't see many posts from RN100 users who are using iSCSI. So it is a bit unusual (supported, but unusual).
WingDog wrote:
with normal share I get 35-40MB/sec
I think that's a usual write speed with an RN100 series. If that's the read-speed, then it sounds a bit slow. Smallnetbuilder tested iSCSI speeds at 40-50 MB/sec (a while ago).
Is the iSCSI LUN is encypted? If so, did you try a test with a small LUN that is not encypted?
StephenB wrote:
WingDog wrote:I don't need snapshots. totally. no any snapshot.
Yes I understand that - just saying that the volume warnings need to cover the broader cases (where shares and snapshots are used).
WingDog wrote:My case is not unusual
I don't see many posts from RN100 users who are using iSCSI. So it is a bit unusual (supported, but unusual).
WingDog wrote:with normal share I get 35-40MB/sec
I think that's a usual write speed with an RN100 series. If that's the read-speed, then it sounds a bit slow. Smallnetbuilder tested iSCSI speeds at 40-50 MB/sec (a while ago).
Is the iSCSI LUN is encypted? If so, did you try a test with a small LUN that is not encypted?
Well, ok.
if this is normal to have at least a half of one NIC throughput (and less than one HDD speed) why this behavior doesn't covered by manual and tech specs?
If vendor (NTGR in this case) has knowledge about poor perfomance why it's Hidden Knowledge?
even in 2015 40-50MB/sec it's poor. and 104 is not older.
Why there is two NICs? for what? for FO? and 4 HDD? the Box can't serve it.
I have Synology DS115j - the same CPU and less RAM.
two HDD, one nic.
95MB/sec SMB copy speed.
80-90 MB/sec iSCSI copy speed.
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