Slow read and write speeds
tuocmd
54 Posts
May 23, 2018, 10:15 amQuote from tuocmd on May 23, 2018, 10:15 amI installed ceph but read speed is only 200mb / s. Can you tell me the reason
I installed ceph but read speed is only 200mb / s. Can you tell me the reason
admin
2,921 Posts
May 23, 2018, 1:38 pmQuote from admin on May 23, 2018, 1:38 pmCan you give more info on what hardware you are using and how you are measuring the speed.
Can you give more info on what hardware you are using and how you are measuring the speed.
tuocmd
54 Posts
May 23, 2018, 10:15 pmQuote from tuocmd on May 23, 2018, 10:15 pmHello,
Hardware includes:
4 osd :
OS: 200GB SAS HDD
Journal: 120GB SSD
OSD DISK: 2TB x04
on a server
5 mon
200GB hdd
ISCSI and Backend runing a 1 sw 10GB
I checked on the client software is read only 200mb / s
Checking on ceph, the write speed is 800mb / s
Hello,
Hardware includes:
4 osd :
OS: 200GB SAS HDD
Journal: 120GB SSD
OSD DISK: 2TB x04
on a server
5 mon
200GB hdd
ISCSI and Backend runing a 1 sw 10GB
I checked on the client software is read only 200mb / s
Checking on ceph, the write speed is 800mb / s
admin
2,921 Posts
May 23, 2018, 10:27 pmQuote from admin on May 23, 2018, 10:27 pmI checked on the client software is read only 200mb / s
Checking on ceph, the write speed is 800mb / s
My question was/is how do you check this ? please give more detail.
5 mon
How do you have 5 mon ? are you running PetaSAN ? What version ?
ISCSI and Backend runing a 1 sw 10GB
What do you mean 1 sw
I checked on the client software is read only 200mb / s
Checking on ceph, the write speed is 800mb / s
My question was/is how do you check this ? please give more detail.
5 mon
How do you have 5 mon ? are you running PetaSAN ? What version ?
ISCSI and Backend runing a 1 sw 10GB
What do you mean 1 sw
Last edited on May 23, 2018, 10:34 pm by admin · #4
tuocmd
54 Posts
May 24, 2018, 12:46 amQuote from tuocmd on May 24, 2018, 12:46 amHow do you have 5 mon ? are you running PetaSAN ? What version ?\
I Running petasan version 2.0
What do you mean 1 sw
ISCSI and Backend runing a 1 switch 10GB
My question was/is how do you check this ? please give more detail.
I connected petasan to esxi and installed a win7 machine to test the write speed is 200mb / s
I benchmarked to achieve a record speed of 700mb / s
How do you have 5 mon ? are you running PetaSAN ? What version ?\
I Running petasan version 2.0
What do you mean 1 sw
ISCSI and Backend runing a 1 switch 10GB
My question was/is how do you check this ? please give more detail.
I connected petasan to esxi and installed a win7 machine to test the write speed is 200mb / s
I benchmarked to achieve a record speed of 700mb / s
admin
2,921 Posts
May 24, 2018, 1:12 amQuote from admin on May 24, 2018, 1:12 amThe installation of Win 7 is a single threaded io stream, if you run several concurrent installs on different vms /esxs at the same time you will get higher total value. Similarly on the benchmark tests, you will get higher values with many threads and low value in case of 1 thread. Also the throughput benchmark uses standard 4M block sizes, the Win 7 install most probably uses a smaller block size so it will be lower.
Last for bluestore to get the best performance we recommend all flash drives, if you use hdd you should get a controller with write back cache.
The installation of Win 7 is a single threaded io stream, if you run several concurrent installs on different vms /esxs at the same time you will get higher total value. Similarly on the benchmark tests, you will get higher values with many threads and low value in case of 1 thread. Also the throughput benchmark uses standard 4M block sizes, the Win 7 install most probably uses a smaller block size so it will be lower.
Last for bluestore to get the best performance we recommend all flash drives, if you use hdd you should get a controller with write back cache.
Last edited on May 24, 2018, 1:14 am by admin · #6
Slow read and write speeds
tuocmd
54 Posts
Quote from tuocmd on May 23, 2018, 10:15 amI installed ceph but read speed is only 200mb / s. Can you tell me the reason
I installed ceph but read speed is only 200mb / s. Can you tell me the reason
admin
2,921 Posts
Quote from admin on May 23, 2018, 1:38 pmCan you give more info on what hardware you are using and how you are measuring the speed.
Can you give more info on what hardware you are using and how you are measuring the speed.
tuocmd
54 Posts
Quote from tuocmd on May 23, 2018, 10:15 pmHello,
Hardware includes:
4 osd :
OS: 200GB SAS HDD
Journal: 120GB SSD
OSD DISK: 2TB x04on a server
5 mon
200GB hdd
ISCSI and Backend runing a 1 sw 10GB
I checked on the client software is read only 200mb / s
Checking on ceph, the write speed is 800mb / s
Hello,
Hardware includes:
4 osd :
OS: 200GB SAS HDD
Journal: 120GB SSD
OSD DISK: 2TB x04
on a server
5 mon
200GB hdd
ISCSI and Backend runing a 1 sw 10GB
I checked on the client software is read only 200mb / s
Checking on ceph, the write speed is 800mb / s
admin
2,921 Posts
Quote from admin on May 23, 2018, 10:27 pmI checked on the client software is read only 200mb / s
Checking on ceph, the write speed is 800mb / sMy question was/is how do you check this ? please give more detail.
5 mon
How do you have 5 mon ? are you running PetaSAN ? What version ?
ISCSI and Backend runing a 1 sw 10GB
What do you mean 1 sw
I checked on the client software is read only 200mb / s
Checking on ceph, the write speed is 800mb / s
My question was/is how do you check this ? please give more detail.
5 mon
How do you have 5 mon ? are you running PetaSAN ? What version ?
ISCSI and Backend runing a 1 sw 10GB
What do you mean 1 sw
tuocmd
54 Posts
Quote from tuocmd on May 24, 2018, 12:46 amHow do you have 5 mon ? are you running PetaSAN ? What version ?\
I Running petasan version 2.0
What do you mean 1 sw
ISCSI and Backend runing a 1 switch 10GB
My question was/is how do you check this ? please give more detail.
I connected petasan to esxi and installed a win7 machine to test the write speed is 200mb / s
I benchmarked to achieve a record speed of 700mb / s
How do you have 5 mon ? are you running PetaSAN ? What version ?\
I Running petasan version 2.0
What do you mean 1 sw
ISCSI and Backend runing a 1 switch 10GB
My question was/is how do you check this ? please give more detail.
I connected petasan to esxi and installed a win7 machine to test the write speed is 200mb / s
I benchmarked to achieve a record speed of 700mb / s
admin
2,921 Posts
Quote from admin on May 24, 2018, 1:12 amThe installation of Win 7 is a single threaded io stream, if you run several concurrent installs on different vms /esxs at the same time you will get higher total value. Similarly on the benchmark tests, you will get higher values with many threads and low value in case of 1 thread. Also the throughput benchmark uses standard 4M block sizes, the Win 7 install most probably uses a smaller block size so it will be lower.
Last for bluestore to get the best performance we recommend all flash drives, if you use hdd you should get a controller with write back cache.
The installation of Win 7 is a single threaded io stream, if you run several concurrent installs on different vms /esxs at the same time you will get higher total value. Similarly on the benchmark tests, you will get higher values with many threads and low value in case of 1 thread. Also the throughput benchmark uses standard 4M block sizes, the Win 7 install most probably uses a smaller block size so it will be lower.
Last for bluestore to get the best performance we recommend all flash drives, if you use hdd you should get a controller with write back cache.