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Hi all ,

I did several loading tests for swift in recent days.

I'm facing an issue ....... Hope you can share you consideration to me ...

My environment:
Swift-proxy with Tempauth in one server : 4 cores/32G rams

Swift-object + Swift-account + Swift-container in storage node * 3 , each
for : 8 cores/32G rams   2TB SATA HDD * 7
=====================================================================================
bench.conf :

[bench]
auth = http://172.168.1.1:8082/auth/v1.0
user = admin:admin
key = admin
concurrency = 200
object_size = 4048
num_objects = 100000
num_gets = 100000
delete = yes
=====================================================================

After 70 rounds .....

PUT operations get lots of failures , but GET still works properly
*ERROR log:*
Jul  1 04:35:03 proxy-server ERROR with Object server
192.168.100.103:36000/DISK6 re: Trying to get final status of PUT to
/v1/AUTH_admin/af5862e653054f7b803d8cf1728412d2_6/24fc2f997bcc4986a86ac5ff992c4370:
Timeout (10s) (txn: txd60a2a729bae46be9b667d10063a319f) (client_ip:
172.168.1.2)
Jul  1 04:34:32 proxy-server ERROR with Object server
192.168.100.103:36000/DISK2 re: Expect: 100-continue on
/AUTH_admin/af5862e653054f7b803d8cf1728412d2_19/35993faa53b849a89f96efd732652e31:Timeout
(10s)


And kernel starts to report failed message as below
*kernel failed log:*
76666 Jul  1 16:37:50 angryman-storage-03 kernel: [350840.020736] w83795
0-002f: Failed to read from register 0x03c, err -6
   76667 Jul  1 16:37:50 angryman-storage-03 kernel: [350840.052654] w83795
0-002f: Failed to read from register 0x015, err -6
   76668 Jul  1 16:37:50 angryman-storage-03 kernel: [350840.080613] w83795
0-002f: Failed to read from register 0x03c, err -6
   76669 Jul  1 16:37:50 angryman-storage-03 kernel: [350840.112583] w83795
0-002f: Failed to read from register 0x016, err -6
   76670 Jul  1 16:37:50 angryman-storage-03 kernel: [350840.144517] w83795
0-002f: Failed to read from register 0x03c, err -6
   76671 Jul  1 16:37:50 angryman-storage-03 kernel: [350840.176468] w83795
0-002f: Failed to read from register 0x017, err -6
   76672 Jul  1 16:37:50 angryman-storage-03 kernel: [350840.208455] w83795
0-002f: Failed to read from register 0x03c, err -6
   76673 Jul  1 16:37:51 angryman-storage-03 kernel: [350840.240410] w83795
0-002f: Failed to read from register 0x01b, err -6
   76674 Jul  1 16:37:51 angryman-storage-03 kernel: [350840.272Jul  1
17:05:28 angryman-storage-03 kernel: imklog 6.2.0, log source          =
/proc/kmsg started.

PUTs become slower and slower , from 1,200/s to 200/s ...

I'm not sure if this is a bug or that's the limitation of XFS. If it's an
limit of XFS . How to improve it ?

An additional question is XFS seems consume lots of memory , does anyone
know about the reason of this behavior?


Appreciate .......


-- 
+Hugo Kuo+
tonytkdk at gmail.com
+ <tonytkdk at gmail.com>886 935004793
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