Subject: |
Re: How to write a python-based backpup tool? |
From: |
Ralph Lange <[email protected]> |
To: |
EPICS tech-talk <[email protected]> |
Date: |
Sat, 17 Sep 2011 13:05:19 +0200 |
On 16.09.2011 23:30, Matt Newville wrote:
>> PS:
>> Is there a difference between a connection to 50K Pvs versus, 50K connections to the same PVs?
> Yes, these are definitely different.
It all depends:
If the 50K PVs reside on 50K different IOCs, the name resolution answers
will come in 50K separate UDP packets, and the client will subsequently
have to open 50K TCP connections and start 100K threads.
If the 50K PVs reside on one IOC, name resolution answers will be in
only few packets, and only one TCP connection with two threads is used
for all data traffic, so the difference to connecting to the same PV 50K
times is rather marginal.
~Ralph
- References:
- How to write a python-based backpup tool? emmanuel_mayssat
- Re: How to write a python-based backpup tool? Matt Newville
- Re: How to write a python-based backpup tool? emmanuel_mayssat
- Re: How to write a python-based backpup tool? Matt Newville
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