On Tue, Jan 30, 2018 at 6:01 PM, Michael B. Smith <[email protected]> wrote:
> How many threads does your I/O controller support? Each disk in the array? > What about quick disconnects? > > No idea. And no idea on how to find out. :-( Can you point me to a clue? It's all HP hardware ... > As a rule of thumb, two threads per spindle is where I start. But some > hardware can support a heck of a lot more than that. And that will overload > some hardware. > > -----Original Message----- > From: [email protected] [mailto:listsadmin@lists. > myitforum.com] On Behalf Of Michael Leone > Sent: Tuesday, January 30, 2018 4:57 PM > To: [email protected] > Subject: Re: [NTSysADM] Multi-Threading Robocopy > > On Tue, Jan 30, 2018 at 4:35 PM, Michael B. Smith <[email protected]> > wrote: > > Doing a /create is going to be MFT lock-bound. You probably won’t get any > > improvement above /MT:2. > > > Mostly I put that in there, as preparation for when I run it without > the /CREATE this weekend. What I'm really interested in is the thread > count when I run a /MIR on a 1.1TB source (I ran the /CREATE based on > a suggestion earlier in this thread). > > > > You are probably far more interested in IO Total > > than anything else. A single thread can be holding a 64 MB buffer, but > > depending on the driver and IO controller there may be darn close to zero > > processor usage (and on others it could have a huge impact – it all > > depends). > > > > > > > > From: [email protected] [mailto:listsadmin@lists. > myitforum.com] > > On Behalf Of Michael Leone > > Sent: Tuesday, January 30, 2018 3:16 PM > > To: [email protected] > > Subject: [NTSysADM] Multi-Threading Robocopy > > > > > > > > In my tests, I've been using a thread count of 20 (/MT:20). While doing a > > /CREATE only run, it seems to not have any impact on performance (based > on > > CPU usage in taskmgr). > > > > > > > > What's your favorite thread count? LOL > > > > > > > > > > >
