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    XenServer Export Performance Seems Poor

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    xenserver xenserver 6.5 gzip
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    • D
      Dashrender
      last edited by

      Right - but you missed what I was saying.

      What makes the application VM any more vulnerable than the NAS/SAMBA share? Nothing really. Hardware wise, the VM is probably better off than the NAS. And a SAMBA share should be inside a VM assuming it's not a NAS, so the SAMBA share is exactly the same as the application VM.

      As I mentioned... the main thing that puts the application at a greater risk is application/OS updates, of which the SAMBA share VM would only have OS updates.

      I'm seeing you trying to say it's better to not have all of your eggs in one basket - which Scott has shown definitely isn't always true.

      As for I'm using a VM mainly because how quickly can I recover this VM yeah, there may be something to that.. but that's not the main reason for me. For me is easy of recover-ability, and portability - meaning I can stand the VM up on pretty much any hardware, easily because it's a VM, not a bare metal restore that will require drivers, etc.

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      • D
        Dashrender
        last edited by

        Add to all that this is nearly a read only system. Sadly I can't truly make it a read only system, I don't have to worry about backups once I have a good working backup in place. If someone makes changes to it, I don't care about those changes.

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        • S
          scottalanmiller @Dashrender
          last edited by

          @Dashrender said:

          Add to all that this is nearly a read only system. Sadly I can't truly make it a read only system...

          Why one and not the other? Meaning, why is it read only but you can't make it read only?

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          • D
            Dashrender @scottalanmiller
            last edited by

            @scottalanmiller said:

            @Dashrender said:

            Add to all that this is nearly a read only system. Sadly I can't truly make it a read only system...

            Why one and not the other? Meaning, why is it read only but you can't make it read only?

            As it was explained to me, there aren't user permissions in the system that allow full reading without also allowing for some level of writing.

            The vendor EOL'ed it in 2013 and we jumped off as close to the date as possible. There are no devs around for it that we have access to.

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            • S
              scottalanmiller @Dashrender
              last edited by

              @Dashrender said:

              As it was explained to me, there aren't user permissions in the system that allow full reading without also allowing for some level of writing.

              So this is a database that the vendor does not control? How does such a weird situation arise?

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              • S
                scottalanmiller
                last edited by

                If you have it running on a VM, surely you can make it read only from a highly level so that there is no need to write?

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                • D
                  Dashrender @scottalanmiller
                  last edited by

                  @scottalanmiller said:

                  @Dashrender said:

                  As it was explained to me, there aren't user permissions in the system that allow full reading without also allowing for some level of writing.

                  So this is a database that the vendor does not control? How does such a weird situation arise?

                  I don't know what you mean?

                  We bought a product called Clinician. It was bought/sold 3 times while we were using it. The last company bought it and killed it, of course in the hopes that we (and the rest) would just jump onto the new owner's main product - which we did not do.

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                  • S
                    scottalanmiller @Dashrender
                    last edited by

                    @Dashrender said:

                    @scottalanmiller said:

                    @Dashrender said:

                    As it was explained to me, there aren't user permissions in the system that allow full reading without also allowing for some level of writing.

                    So this is a database that the vendor does not control? How does such a weird situation arise?

                    I don't know what you mean?

                    We bought a product called Clinician. It was bought/sold 3 times while we were using it. The last company bought it and killed it, of course in the hopes that we (and the rest) would just jump onto the new owner's main product - which we did not do.

                    I mean, if you don't want the system to be writeable... that's up to you, not up to the product, right? So if it is read only, you can make it so. That the product requires the ability to write seems to be inconsequential, how would it do that? You can make the system either refuse writes or just make it roll back on reboot. In either case, you have no needs to treat it any way other than RO.

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                      Dashrender @scottalanmiller
                      last edited by

                      @scottalanmiller said:

                      If you have it running on a VM, surely you can make it read only from a highly level so that there is no need to write?

                      I don't understand this either.

                      The VM presents an IIS .Net website that only works in IE with a back end of SQL 2008 Server.

                      Are you proposing that I could either

                      1. make the VM read only
                      2. make the SQL DB read only
                      3. make the IIS site read only

                      In all of these cases I have to assume that making it read only would break the way it works - I don't know this, but I'm assuming this.

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                      • S
                        scottalanmiller @Dashrender
                        last edited by

                        @Dashrender said:

                        Are you proposing that I could either

                        1. make the VM read only
                        2. make the SQL DB read only
                        3. make the IIS site read only

                        In all of these cases I have to assume that making it read only would break the way it works - I don't know this, but I'm assuming this.

                        All, lock it down. If the data is read only, you don't want it changing, ever, right? So stop it from changing. IIS should be read only anyway, why would that not be stateless? The DB is probably doing something, but what do you care? You want it read only. So just roll it back with every reboot or forbid it to write at all.

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                        • D
                          Dashrender @scottalanmiller
                          last edited by

                          @scottalanmiller said:

                          @Dashrender said:

                          @scottalanmiller said:

                          @Dashrender said:

                          As it was explained to me, there aren't user permissions in the system that allow full reading without also allowing for some level of writing.

                          So this is a database that the vendor does not control? How does such a weird situation arise?

                          I don't know what you mean?

                          We bought a product called Clinician. It was bought/sold 3 times while we were using it. The last company bought it and killed it, of course in the hopes that we (and the rest) would just jump onto the new owner's main product - which we did not do.

                          I mean, if you don't want the system to be writeable... that's up to you, not up to the product, right? So if it is read only, you can make it so. That the product requires the ability to write seems to be inconsequential, how would it do that? You can make the system either refuse writes or just make it roll back on reboot. In either case, you have no needs to treat it any way other than RO.

                          Oh well sure - I can definitely make it role back on reboots - though, now that I think about it.. I can't do that either.. because while I want the data itself to be read only - I need access logs. Those logs are part of the system itself. Now those logs are in the SQL DB, and I could just backup the SQL DB or find a way to export them and only backup that part... then worry less about the rest...

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                          • DustinB3403D
                            DustinB3403
                            last edited by

                            I think what @scottalanmiller is saying is similar to what I was asking.

                            Why not make the VM "static" pushing all of the files off to something else. This way you're protecting the VM while still providing a good way to recover should something go sideways.

                            BRRABillB 1 Reply Last reply Reply Quote 0
                            • S
                              scottalanmiller @Dashrender
                              last edited by

                              @Dashrender said:

                              Oh well sure - I can definitely make it role back on reboots - though, now that I think about it.. I can't do that either.. because while I want the data itself to be read only - I need access logs. Those logs are part of the system itself. Now those logs are in the SQL DB, and I could just backup the SQL DB or find a way to export them and only backup that part... then worry less about the rest...

                              So it is NOT read only, hence the problem.

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                              • D
                                Dashrender @scottalanmiller
                                last edited by

                                @scottalanmiller said:

                                @Dashrender said:

                                Oh well sure - I can definitely make it role back on reboots - though, now that I think about it.. I can't do that either.. because while I want the data itself to be read only - I need access logs. Those logs are part of the system itself. Now those logs are in the SQL DB, and I could just backup the SQL DB or find a way to export them and only backup that part... then worry less about the rest...

                                So it is NOT read only, hence the problem.

                                Continuing discussion has brought this to the surface.. I wasn't intentionally just not mentioning it earlier.. so yeah... that part at least is not read only.

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                                • BRRABillB
                                  BRRABill @DustinB3403
                                  last edited by

                                  @DustinB3403 said:

                                  Why not make the VM "static" pushing all of the files off to something else. This way you're protecting the VM while still providing a good way to recover should something go sideways.

                                  But that amount of data is still going to take a while to recover, regardless of where it is.

                                  Granted, you can get the applciation VM back up and start restoring the important pieces of the data. Is that what you mean?

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                                  • S
                                    scottalanmiller @Dashrender
                                    last edited by

                                    @Dashrender said:

                                    @scottalanmiller said:

                                    @Dashrender said:

                                    Oh well sure - I can definitely make it role back on reboots - though, now that I think about it.. I can't do that either.. because while I want the data itself to be read only - I need access logs. Those logs are part of the system itself. Now those logs are in the SQL DB, and I could just backup the SQL DB or find a way to export them and only backup that part... then worry less about the rest...

                                    So it is NOT read only, hence the problem.

                                    Continuing discussion has brought this to the surface.. I wasn't intentionally just not mentioning it earlier.. so yeah... that part at least is not read only.

                                    Can the logs just go elsewhere? ELK for example?

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                                    • D
                                      Dashrender @scottalanmiller
                                      last edited by

                                      @scottalanmiller said:

                                      @Dashrender said:

                                      @scottalanmiller said:

                                      @Dashrender said:

                                      Oh well sure - I can definitely make it role back on reboots - though, now that I think about it.. I can't do that either.. because while I want the data itself to be read only - I need access logs. Those logs are part of the system itself. Now those logs are in the SQL DB, and I could just backup the SQL DB or find a way to export them and only backup that part... then worry less about the rest...

                                      So it is NOT read only, hence the problem.

                                      Continuing discussion has brought this to the surface.. I wasn't intentionally just not mentioning it earlier.. so yeah... that part at least is not read only.

                                      Can the logs just go elsewhere? ELK for example?

                                      If I pay a developer to learn how it works - sure it could.

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                                      • S
                                        scottalanmiller
                                        last edited by

                                        Where are the logs going now?

                                        D 1 Reply Last reply Reply Quote 0
                                        • DustinB3403D
                                          DustinB3403
                                          last edited by

                                          If I recall correctly @Dashrender said the files on this server aren't the critical point for it, IE they are used when they are created and then put away into the storage on the VM.

                                          Which is that's the case, why not limit the size of the VM, allowing for a faster recovery of the VM, and then piece meal restore the data as it's needed from something like a Synology NAS.

                                          My point is, the VM as describe is only 700GB because it was allowed to grow to this size, but it could be a meager 150GB.

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                                          • D
                                            Dashrender @scottalanmiller
                                            last edited by

                                            @scottalanmiller said:

                                            Where are the logs going now?

                                            Into the SQL DB on the server.
                                            same place where the EHR data lives.

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