HI, > You know many people who backup PC hard drives? To what? And some kind of synchronized backup so when multiple restores need to be done the application still works.
I can restore multiple backups in the same time. using Multi threading. The data can be in the net or in the same Hard disk. MFNetDisk manage all the backup. MFNetDisk have catalog of all the backups for each MVS device. >TCP is a protocol, how do you make it faster? Can you make English faster? The network speed will not be faster than your your slowest link. The mainframe is about doing thousands of things per minute, NFS works because it was not trying to handle the same workload as the mainframe. I suppose if I care about speed then I must run my own intra-net wiring where I can control the traffic on the wiring. The minute I use the inter-net, I am subject to routing beyond my control. IP V6 with prioritizing is not going to get sub- second response time between a mainframe on the west coast of USA and a PC file in Nepal because all the links i between are not going to give a hoot that 'my' trafficreally is more important than 'your' traffic. My product does not intent to replace the Ficon real 3390. But if a company need to share disk in the net and to use all the nice (you said) features of my product and to be aware that the speed will be slower then the Ficon, then it is OK with me. Also my product make net mirroring, all the company which use net mirroring will have bad performance, That is a fact. Net line is a slower media then local line. >Sounds like you have a niche product for the home hobbyist, like Hercules. Hercules on a PC is not expected to handle millions of credit card transactions per day. NFS on the mainframe gives access to a network file, there is no claim you will get performance above what the slowest can give. Therefore, time sensitive transactions do not store their data on NFS disk files. I never claim that my 3390 will replace the local 3390 disks. My product can work good with Hercules and real MF as well. Right now not to process million of DB2 transactions but to be able o let the user recover the data quickly even if the performance will not be the same as real local 3390. >Those shops who are looking to have 'instant' disaster recovery already need speed, reliability, and support. I can give immediately access to their data in the speed of the TCP/IP and everything depend on how the TCP is configure and the hardware they use for the TCP. And yes, the TCP in MF was very slow because IBM use the TCP as software which use the SNA etc. and that why the IBM TCP was bad. But is become better and better and faster. IBM claim that they like to be big server and I ask you how they going to do it without TCP in open system. You think that they can force everyone to use Ficon? Can you imagine that MS and Lynux will change their local disk to Ficon? TCP in MF is faster then ever and i know that IBM understand that. >What happens to the application when those PC's and their drives start failing? Please install my product and try it, and at least try to read my documentation you will see that PC can mirror another PC and have backup data there. My product is a great solution to Medium and small sites at least at the beginning. And I can assure you that also big company will or already use my product for the backups, for replace real 3390 with another real 3390, for DR and for remote sharing disk. The emulation 3390 feature can be used for the restored 3390 which will allow you to access the data immediately. Easily I can buy Ficon card fro bustech and create the speed of Ficon but I want my product to use net and be the only one who give to MF what my product bring. And please try my product in MF and let everyone know about your experience. To download it use www.mfnetdisk.com Thanks, Shai On 1/5/08, Kenneth E Tomiak <[EMAIL PROTECTED]> wrote: > > On Wed, 2 Jan 2008 22:16:04 -0800, shai hess <[EMAIL PROTECTED]> > wrote: > > > Yes, if you need local 3390 it is faster to use directly connect > >FICON/ESCON real 3390. Using TCP with MFNetDIsk is a feature which nobody > >have and I really do not like to be one of a many OEM which use the real > >3390 and by that have limitation which i do not have, like remote 3390 > disk, > >DR, uses all PC features, PC backup and more. > > > > You know many people who backup PC hard drives? To what? And some kind > of synchronized backup so when multiple restores need to be done the > application still works. > > ><Obviously performance would suffer depending on the > >available bandwidth for remote TCPIP transmission of IO but for an > >absolute DR capability, the product has many facets I can visualise. > > > >Yes, TCP is a problem like the Hard disk in the past was a problem when > try > >to use it in EMC, IBM and more to emulate 3390 disks but now everyone use > >Hardisk to do the emulation. I know that TCP is faster and faster > everyday. > >IBM must do more to make the TCP the same faster. > > TCP is a protocol, how do you make it faster? Can you make English faster? > The network speed will not be faster than your your slowest link. The > mainframe is about doing thousands of things per minute, NFS works because > it was not trying to handle the same workload as the mainframe. I suppose > if > I care about speed then I must run my own intra-net wiring where I can > control the traffic on the wiring. The minute I use the inter-net, I am > subject > to routing beyond my control. IP V6 with prioritizing is not going to get > sub- > second response time between a mainframe on the west coast of USA and a > PC file in Nepal because all the links i between are not going to give a > hoot > that 'my' trafficreally is more important than 'your' traffic. > > Sounds like you have a niche product for the home hobbyist, like Hercules. > Hercules on a PC is not expected to handle millions of credit card > transactions > per day. NFS on the mainframe gives access to a network file, there is no > claim you will get performance above what the slowest can give. Therefore, > time sensitive transactions do not store their data on NFS disk files. > > Those shops who are looking to have 'instant' disaster recovery already > need > speed, reliability, and support. > > What happens to the application when those PC's and their drives start > failing? > > > >About TCPIP bandwidth, Yes if you have slower TCP lines, MFNetDisk > >will work slowly, But in today cost everyone can have faster TCP > connection. > > > ><but for an > >absolute DR capability, the product has many facets I can visualise. > > > >Thanks. > > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
