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Posted to commits@cloudstack.apache.org by GitBox <gi...@apache.org> on 2021/09/23 03:16:24 UTC
[GitHub] [cloudstack] leolleeooleo opened a new issue #5500: CEPH Primary Storage capacity calculate
leolleeooleo opened a new issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500
##### ISSUE TYPE
* Improvement Request
##### COMPONENT NAME
~~~
UI
~~~
##### CLOUDSTACK VERSION
~~~
4.15.2
~~~
##### CONFIGURATION
CEPH Primary Storage
##### OS / ENVIRONMENT
N/A
##### SUMMARY
CEPH Storage has Replica Size as 3.
Disk Total and Disk Size Used need Divide by CEPH Replica Size.
##### STEPS TO REPRODUCE
##### EXPECTED RESULTS
~~~
2.12 TB Used : Real Used (need Divide by CEPH Replica Size)
9.70 TB Actual Total : Actual can use (need Divide by CEPH Replica Size)
8.05 TB Allocated: Disk Allocated
19.40 TB Total : Actual can use (need Divide by CEPH Replica Size) * Overprovisioning Factor
~~~
##### ACTUAL RESULTS
~~~
6.35 TB Used : Real Used * CEPH Replica Size
29.10 TB Actual Total : All CEPH Space
8.05 TB Allocated: Disk Allocated
58.20 TB Total : All CEPH Space * Overprovisioning Factor
~~~
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[GitHub] [cloudstack] rohityadavcloud edited a comment on issue #5500: CEPH Primary Storage capacity calculate
Posted by GitBox <gi...@apache.org>.
rohityadavcloud edited a comment on issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500#issuecomment-1002461560
Hi @leolleeooleo I'm using Ceph v16 (pacific) with ACS 4.16.0.0 and not able to reproduce this, however, I update the max pool capacity after adding it: (in this example, max. allocatable capacity of ceph cluster/pool set to 200GB; the ceph pool has 3xreplica)
```
> update storagepool capacitybytes=214748364800 id=<pool-id>
{
"storagepool": {
"created": "2021-12-22T12:22:54+0000",
"disksizeallocated": 109735575552,
"disksizetotal": 214748364800,
"disksizeused": 65567482252,
"hasannotations": false,
"hypervisor": "KVM",
"id": "--redacted--",
"ipaddress": "a.b.c.d",
"name": "MeowCeph",
"overprovisionfactor": "1.0",
"path": "XXXXX",
"provider": "DefaultPrimary",
"scope": "ZONE",
"state": "Up",
"tags": "ceph",
"type": "RBD",
"zoneid": "ZZZZZ",
"zonename": "MeowZone"
}
}
```
I also set overprovisioning value to 1.0 for my pool, in my case the storage value is shown correctly on the dashboard.
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[GitHub] [cloudstack] rohityadavcloud commented on issue #5500: CEPH Primary Storage capacity calculate
Posted by GitBox <gi...@apache.org>.
rohityadavcloud commented on issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500#issuecomment-1002461560
Hi @leolleeooleo I'm using Ceph v16 (pacific) with ACS 4.16.0.0 and not able to reproduce this, however I update the max pool capacity after adding it: (in this example, max. allocatable capacity of ceph cluster/pool set to 200GB)
```
> update storagepool capacitybytes=214748364800 id=<pool-id>
{
"storagepool": {
"created": "2021-12-22T12:22:54+0000",
"disksizeallocated": 109735575552,
"disksizetotal": 214748364800,
"disksizeused": 65567482252,
"hasannotations": false,
"hypervisor": "KVM",
"id": "--redacted--",
"ipaddress": "a.b.c.d",
"name": "MeowCeph",
"overprovisionfactor": "1.0",
"path": "XXXXX",
"provider": "DefaultPrimary",
"scope": "ZONE",
"state": "Up",
"tags": "ceph",
"type": "RBD",
"zoneid": "ZZZZZ",
"zonename": "MeowZone"
}
}
```
I also set overprovisioning value to 1.0 for my pool, in my case the storage value is shown correctly on the dashboard.
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[GitHub] [cloudstack] leolleeooleo commented on issue #5500: CEPH Primary Storage capacity calculate
Posted by GitBox <gi...@apache.org>.
leolleeooleo commented on issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500#issuecomment-1046209083
Hi @rohityadavcloud ,
For example
Ceph Total Disk Capacity: 9 TiB
Replica set: 3
CloudStack Overprovisioning Factor: 2
CloudStack Disk Allocated: 2 TiB
CloudStack Disk Size Used: 1.8 TiB (with Replica is 5.4 TiB)
1. Why Used 5.4 TB is over then Allocated 2TB?
It is weird.
2. Does it means VM can storage more 3.6 TB (9-5.4)?
No. Actually VM can just storage 1.2 TB.
3. Does it means Overprovisioning Factor is 2?
No. You can only storage 3 TB with Replica in 9 TB, the real Overprovisioning Factor is 18 TB / 3 TB = 6
Then I set Capacity Bytes to 3 TiB.
1. Does it means used Disk Space is 180%?
No.
In my opinion,
Only shows how much CloudStack can use in CloudStack.
And the Disk and Replica show on Ceph Dashboard.
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[GitHub] [cloudstack] rohityadavcloud edited a comment on issue #5500: CEPH Primary Storage capacity calculate
Posted by GitBox <gi...@apache.org>.
rohityadavcloud edited a comment on issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500#issuecomment-1038905927
Hi @leolleeooleo I see what you mean now. But in case my the replica set is 3, so ideally used should be 23 * 3 (=69GB?). But I see what you mean, the stored is the actual usage not considering the replicated objects. Let me share my current stats/screenshots (these maybe old, now I've moved to 3osds, 1tb ssd each) and ask if the total is stored capacity or raw capacity (I think total in cloudstack is raw capacity too, so it does not matter I think?):
<img width="970" alt="Screenshot 2022-02-14 at 3 44 52 PM" src="https://user-images.githubusercontent.com/95203/153845203-2f451b50-6769-44e2-baff-acc2d2f02d4f.png">
<img width="388" alt="Screenshot 2022-02-14 at 3 45 20 PM" src="https://user-images.githubusercontent.com/95203/153845219-419839ef-7c9a-422f-8957-669a5fda0c9e.png">
```
# ceph df
--- RAW STORAGE ---
CLASS SIZE AVAIL USED RAW USED %RAW USED
ssd 2.7 TiB 1.6 TiB 1.2 TiB 1.2 TiB 42.85
TOTAL 2.7 TiB 1.6 TiB 1.2 TiB 1.2 TiB 42.85
--- POOLS ---
POOL ID PGS STORED OBJECTS USED %USED MAX AVAIL
device_health_metrics 1 1 2.0 MiB 1 5.9 MiB 0 486 GiB
meowceph 2 64 30 GiB 7.95k 83 GiB 5.41 486 GiB
...
```
cc @wido @GabrielBrascher @weizhouapache do you know/remember if the pool total/capacity in CloudStack relates to the raw capacity or the storable/stored capacity? Basically is this expected or we should fix the parsing to get stored capacity instead of used capacity from ceph.
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[GitHub] [cloudstack] MejdiB commented on issue #5500: CEPH Primary Storage capacity calculate
Posted by GitBox <gi...@apache.org>.
MejdiB commented on issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500#issuecomment-942363630
I assume you are using a single replica pool and an rbd pool for the rbd images. What about if someone has multiple pools on his/her Ceph cluster eg. erasure coding pools and replica pools. How would Cloudstack know which pool to choose for the calculation?
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[GitHub] [cloudstack] rohityadavcloud edited a comment on issue #5500: CEPH Primary Storage capacity calculate
Posted by GitBox <gi...@apache.org>.
rohityadavcloud edited a comment on issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500#issuecomment-1002461560
Hi @leolleeooleo I'm using Ceph v16 (pacific) with ACS 4.16.0.0 and not able to reproduce this, however, I update the max pool capacity after adding it: (in this example, max. allocatable capacity of ceph cluster/pool set to 200GB; the ceph pool has 3xreplica)
```
> update storagepool capacitybytes=214748364800 id=<pool-id>
{
"storagepool": {
"created": "2021-12-22T12:22:54+0000",
"disksizeallocated": 109735575552,
"disksizetotal": 214748364800,
"disksizeused": 65567482252,
"hasannotations": false,
"hypervisor": "KVM",
"id": "--redacted--",
"ipaddress": "a.b.c.d",
"name": "MeowCeph",
"overprovisionfactor": "1.0",
"path": "XXXXX",
"provider": "DefaultPrimary",
"scope": "ZONE",
"state": "Up",
"tags": "ceph",
"type": "RBD",
"zoneid": "ZZZZZ",
"zonename": "MeowZone"
}
}
```
I also set overprovisioning value to 1.0 for my pool, in my case the storage value is shown correctly on the dashboard.
Additional info:
```
root@cloudpi:~# ceph df
--- RAW STORAGE ---
CLASS SIZE AVAIL USED RAW USED %RAW USED
ssd 2.7 TiB 1.7 TiB 1.1 TiB 1.1 TiB 38.53
TOTAL 2.7 TiB 1.7 TiB 1.1 TiB 1.1 TiB 38.53
--- POOLS ---
POOL ID PGS STORED OBJECTS USED %USED MAX AVAIL
device_health_metrics 1 1 235 KiB 1 704 KiB 0 526 GiB
meowceph 2 64 23 GiB 6.21k 61 GiB 3.73 526 GiB
... other pools ...
```
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[GitHub] [cloudstack] rohityadavcloud edited a comment on issue #5500: CEPH Primary Storage capacity calculate
Posted by GitBox <gi...@apache.org>.
rohityadavcloud edited a comment on issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500#issuecomment-1038905927
Hi @leolleeooleo I see what you mean now. But in case my the replica set is 3, so ideally used should be 23 * 3 (=69GB?). But I see what you mean, the stored is the actual usage not considering the replicated objects. Let me share my current stats/screenshots (now I've moved to 3osds, 1tb ssd each) and ask if the total is stored capacity or raw capacity (I think total in cloudstack is raw capacity too, so it does not matter I think?):
<img width="970" alt="Screenshot 2022-02-14 at 3 44 52 PM" src="https://user-images.githubusercontent.com/95203/153845203-2f451b50-6769-44e2-baff-acc2d2f02d4f.png">
<img width="388" alt="Screenshot 2022-02-14 at 3 45 20 PM" src="https://user-images.githubusercontent.com/95203/153845219-419839ef-7c9a-422f-8957-669a5fda0c9e.png">
```
# ceph df
--- RAW STORAGE ---
CLASS SIZE AVAIL USED RAW USED %RAW USED
ssd 2.7 TiB 1.6 TiB 1.2 TiB 1.2 TiB 42.85
TOTAL 2.7 TiB 1.6 TiB 1.2 TiB 1.2 TiB 42.85
--- POOLS ---
POOL ID PGS STORED OBJECTS USED %USED MAX AVAIL
device_health_metrics 1 1 2.0 MiB 1 5.9 MiB 0 486 GiB
meowceph 2 64 30 GiB 7.95k 83 GiB 5.41 486 GiB
...
```
cc @wido @GabrielBrascher @weizhouapache do you know/remember if the pool total/capacity in CloudStack relates to the raw capacity or the storable/stored capacity? Basically is this expected or we should fix the parsing to get stored capacity instead of used capacity from ceph.
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[GitHub] [cloudstack] leolleeooleo edited a comment on issue #5500: CEPH Primary Storage capacity calculate
Posted by GitBox <gi...@apache.org>.
leolleeooleo edited a comment on issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500#issuecomment-1037816268
@rohityadavcloud
Yes, I've tried to set Capacity Bytes.
It did set "Disk Total (actual size can be stored)" and "Disk Total with Overprovisioning Factor (can be allocated)" ,
but "Disk Size Used" is caculated with replica set, that could be over "Disk Total (actual size can be stored)".
For your example,
```
--- POOLS ---
POOL ID PGS STORED OBJECTS USED %USED MAX AVAIL
device_health_metrics 1 1 235 KiB 1 704 KiB 0 526 GiB
meowceph 2 64 23 GiB 6.21k 61 GiB 3.73 526 GiB
^ ^
23 GiB is Used of Allocated 61 GiB is caculated with replica set
```
So it should be
And the second thing is the Capacity Bytes setting disappear when any one of cloudstack-agent restart.
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[GitHub] [cloudstack] wido commented on issue #5500: CEPH Primary Storage capacity calculate
Posted by GitBox <gi...@apache.org>.
wido commented on issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500#issuecomment-1047441641
It is correct that CloudStack does not know how much data is being used inside Ceph.
CloudStack gets its information from libvirt, try running this on one of the hypervisors:
<pre>
virsh pool-list
virsh pool-info <uuid>
</pre>
Ceph reports back:
- Total RAW capacity of Ceph
- Stored bytes on Ceph
CloudStack nor libvirt know if the replication size configured in Ceph is 2x, 3x, 4x, etc. Or it even is Erasure Coding.
Ceph also can't tell you how much data you can store in your cluster as it depends on the replication size for each pool.
Maybe we can improve things here, but this does depend on Libvirt giving the right information to CloudStack.
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[GitHub] [cloudstack] leolleeooleo edited a comment on issue #5500: CEPH Primary Storage capacity calculate
Posted by GitBox <gi...@apache.org>.
leolleeooleo edited a comment on issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500#issuecomment-1037816268
@rohityadavcloud
Yes, I've tried to set Capacity Bytes.
It did set "Disk Total (actual size can be stored)" and "Disk Total with Overprovisioning Factor (can be allocated)" ,
but "Disk Size Used" is caculated with replica set, that could be over "Disk Total (actual size can be stored)".
For your example,
```
--- POOLS ---
POOL ID PGS STORED OBJECTS USED %USED MAX AVAIL
device_health_metrics 1 1 235 KiB 1 704 KiB 0 526 GiB
meowceph 2 64 23 GiB 6.21k 61 GiB 3.73 526 GiB
^ ^
23 GiB is Used of Allocated 61 GiB is caculated with replica set
```
So it should be
And the second thing is the Capacity Bytes setting disappear when any one of cloudstack-agent restart.
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[GitHub] [cloudstack] leolleeooleo commented on issue #5500: CEPH Primary Storage capacity calculate
Posted by GitBox <gi...@apache.org>.
leolleeooleo commented on issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500#issuecomment-1037816268
@rohityadavcloud
Yes, I've tried to set Capacity Bytes.
It did set "Disk Total (actual size can be stored)" and "Disk Total with Overprovisioning Factor (can be allocated)" ,
but "Disk Size Used" is caculated with replica set, that could be over "Disk Total (actual size can be stored)".
For your example,
```
--- POOLS ---
POOL ID PGS STORED OBJECTS USED %USED MAX AVAIL
device_health_metrics 1 1 235 KiB 1 704 KiB 0 526 GiB
meowceph 2 64 23 GiB 6.21k 61 GiB 3.73 526 GiB
^ ^
23 GiB is Actual Disk Used 61 GiB is caculated with replica set
```
So it should be
And the second thing is the Capacity Bytes setting disappear when any one of cloudstack-agent restart.
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[GitHub] [cloudstack] rohityadavcloud commented on issue #5500: CEPH Primary Storage capacity calculate
Posted by GitBox <gi...@apache.org>.
rohityadavcloud commented on issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500#issuecomment-1038905927
Hi @leolleeooleo I see what you mean now. But in case my the replicate set is 3, so ideally used should be 23 * 3 (=69GB?). But I see what you mean, the stored is the actual usage not considering the replicated objects. Let me share my current stats/screenshots (these maybe old, now I've moved to 3osds, 1tb ssd each) and ask if the total is stored capacity or raw capacity (I think total in cloudstack is raw capacity too, so it does not matter I think?):
<img width="970" alt="Screenshot 2022-02-14 at 3 44 52 PM" src="https://user-images.githubusercontent.com/95203/153845203-2f451b50-6769-44e2-baff-acc2d2f02d4f.png">
<img width="388" alt="Screenshot 2022-02-14 at 3 45 20 PM" src="https://user-images.githubusercontent.com/95203/153845219-419839ef-7c9a-422f-8957-669a5fda0c9e.png">
```
# ceph df
--- RAW STORAGE ---
CLASS SIZE AVAIL USED RAW USED %RAW USED
ssd 2.7 TiB 1.6 TiB 1.2 TiB 1.2 TiB 42.85
TOTAL 2.7 TiB 1.6 TiB 1.2 TiB 1.2 TiB 42.85
--- POOLS ---
POOL ID PGS STORED OBJECTS USED %USED MAX AVAIL
device_health_metrics 1 1 2.0 MiB 1 5.9 MiB 0 486 GiB
meowceph 2 64 30 GiB 7.95k 83 GiB 5.41 486 GiB
...
```
cc @wido @GabrielBrascher @weizhouapache do you know/remember if the pool total/capacity in CloudStack relates to the raw capacity or the storable/stored capacity? Basically is this expected or we should fix the parsing to get stored capacity instead of used capacity from ceph.
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[GitHub] [cloudstack] leolleeooleo commented on issue #5500: CEPH Primary Storage capacity calculate
Posted by GitBox <gi...@apache.org>.
leolleeooleo commented on issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500#issuecomment-1037816268
@rohityadavcloud
Yes, I've tried to set Capacity Bytes.
It did set "Disk Total (actual size can be stored)" and "Disk Total with Overprovisioning Factor (can be allocated)" ,
but "Disk Size Used" is caculated with replica set, that could be over "Disk Total (actual size can be stored)".
For your example,
```
--- POOLS ---
POOL ID PGS STORED OBJECTS USED %USED MAX AVAIL
device_health_metrics 1 1 235 KiB 1 704 KiB 0 526 GiB
meowceph 2 64 23 GiB 6.21k 61 GiB 3.73 526 GiB
^ ^
23 GiB is Actual Disk Used 61 GiB is caculated with replica set
```
So it should be
And the second thing is the Capacity Bytes setting disappear when any one of cloudstack-agent restart.
--
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[GitHub] [cloudstack] leolleeooleo commented on issue #5500: CEPH Primary Storage capacity calculate
Posted by GitBox <gi...@apache.org>.
leolleeooleo commented on issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500#issuecomment-991469175
Use `ceph df` that is no need to know erasure coding pools or replica.
https://docs.ceph.com/en/latest/rados/operations/monitoring/#checking-a-cluster-s-usage-stats
~~~
# ceph df
--- RAW STORAGE ---
CLASS SIZE AVAIL USED RAW USED %RAW USED
hdd 29 TiB 21 TiB 8.2 TiB 8.2 TiB 28.21
TOTAL 29 TiB 21 TiB 8.2 TiB 8.2 TiB 28.21
--- POOLS ---
POOL ID PGS STORED OBJECTS USED %USED MAX AVAIL
device_health_metrics 1 1 0 B 0 0 B 0 5.8 TiB
cloudstack 2 256 2.7 TiB 724.29k 8.2 TiB 31.88 5.8 TiB
~~~
In the POOLS section are not inclusive of the number of replicas, snapshots or clones.
STORED : actual amount of data has stored.
MAX AVAIL : estimated amount of data that can be written.
~~~
Used = STORED
Actual Total = STORED + MAX AVAIL
Allocated: Disk Allocated
Total = (STORED + MAX AVAIL) * Overprovisioning Factor
~~~
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[GitHub] [cloudstack] leolleeooleo commented on issue #5500: CEPH Primary Storage capacity calculate
Posted by GitBox <gi...@apache.org>.
leolleeooleo commented on issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500#issuecomment-991469175
Use `ceph df` that is no need to know erasure coding pools or replica.
https://docs.ceph.com/en/latest/rados/operations/monitoring/#checking-a-cluster-s-usage-stats
~~~
# ceph df
--- RAW STORAGE ---
CLASS SIZE AVAIL USED RAW USED %RAW USED
hdd 29 TiB 21 TiB 8.2 TiB 8.2 TiB 28.21
TOTAL 29 TiB 21 TiB 8.2 TiB 8.2 TiB 28.21
--- POOLS ---
POOL ID PGS STORED OBJECTS USED %USED MAX AVAIL
device_health_metrics 1 1 0 B 0 0 B 0 5.8 TiB
cloudstack 2 256 2.7 TiB 724.29k 8.2 TiB 31.88 5.8 TiB
~~~
In the POOLS section are not inclusive of the number of replicas, snapshots or clones.
STORED : actual amount of data has stored.
MAX AVAIL : estimated amount of data that can be written.
~~~
Used = STORED
Actual Total = STORED + MAX AVAIL
Allocated: Disk Allocated
Total = (STORED + MAX AVAIL) * Overprovisioning Factor
~~~
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[GitHub] [cloudstack] MejdiB commented on issue #5500: CEPH Primary Storage capacity calculate
Posted by GitBox <gi...@apache.org>.
MejdiB commented on issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500#issuecomment-942363630
I assume you are using a single replica pool and an rbd pool for the rbd images. What about if someone has multiple pools on his/her Ceph cluster eg. erasure coding pools and replica pools. How would Cloudstack know which pool to choose for the calculation?
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[GitHub] [cloudstack] nvazquez commented on issue #5500: CEPH Primary Storage capacity calculate
Posted by GitBox <gi...@apache.org>.
nvazquez commented on issue #5500:
URL: https://github.com/apache/cloudstack/issues/5500#issuecomment-1030655652
Hi @leolleeooleo is this issue still valid?
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