Nakivo Backup & Replication 7 – Skip Swap File!

What is Swap File?

Swap file is a system file that will be created by operating system to paging RAM blocks to hard disk and it’s larger than RAM size usually. In Windows, we know it as “Virtual Memory” and swap space in Linux.

Swapping

In computer operating systems, paging is a memory management scheme by which a computer stores and retrieves data from secondary storage for use in main memory. In this scheme, the operating system retrieves data from secondary storage in same-size blocks called pages. Paging is an important part of virtual memory implementations in modern operating systems, using secondary storage to let programs exceed the size of available physical memory.

For simplicity, main memory is called “RAM” (abbreviated from “random-access memory”) and secondary storage is called “disk” (a shorthand for “hard disk drive”), but the concepts do not depend on whether these terms apply literally to a specific computer system.

So swap files are temporary files to keep some blocks of memory and if OS needs the blocks will write on memory again. So actually, there is no user data or critical data.

What if you have to take backup from your machines and the machines have large swap space?!

The answer is very easy! You have to buy more storage space for archiving your backup files.

Because swap files increase your backup size!

What’s Solution?

There is some solutions to delete swap files or clear swap space during shutting down OS but what about live system? Can you remove swap file when your OS is live?

Actually, there is no way and if you want to take full backup, you have to calculate backup space larger than OS, application and users data.

Actually, we are talking about virtual machines in this post, so I want to share good news with you!

Nakivo Backup & Replication 7 can skip swap files and speedup backup transfer and reduce your backup space.

Don’t miss it!

So download beta version from Nakivo website.

Join Beta! Get a Gift Card!

Nakivo 7 BETA

Get an Amazon gift card for performing the following tasks:

  • Download NAKIVO Backup & Replication v7 Beta and install it in your environment
  • Add at least one Hyper-V host to the inventory
  • Back up or replicate at least one VM
  • Perform any of the following:
    • Instant file recovery, object recovery for Exchange or object recovery for Active Directory
    • Full VM recovery
  • Create and send a support bundle to support with “v7 Beta Promotion” in the description.
  • Fill out the survey.

Previous posts about Nakivo Backup & Replication 7:

Nakivo Backup & Replication 7 – vSphere 6.5 Support!

Nakivo 7 Beta! Hyper-V Supported Now!

202 total views, 61 views today

Updated: January 19, 2017 — 11:29 pm

Nakivo Backup & Replication 7 – vSphere 6.5 Support!

Nakivo Backup & Replication 7 beta has been introduced by Nakivo last week. It comes with lot of new features and the beta version is available for download on Nakivo website.

Read my previous post about Nakivo Backup & Replication 7 beta: 

Nakivo 7 Beta! Hyper-V Supported Now!

Supporting Hyper-V has been added to the new version but it seems, some other new features are coming.

Nakivo 7 will support VMware vSphere 6.5 and if you have plan to upgrade your vSphere environment to vSphere 6.5, there is no concern about your data!

Join Beta! Get a Gift Card!

Nakivo 7 BETA

Get an Amazon gift card for performing the following tasks:

  • Download NAKIVO Backup & Replication v7 Beta and install it in your environment
  • Add at least one Hyper-V host to the inventory
  • Back up or replicate at least one VM
  • Perform any of the following:
    • Instant file recovery, object recovery for Exchange or object recovery for Active Directory
    • Full VM recovery
  • Create and send a support bundle to support with “v7 Beta Promotion” in the description.
  • Fill out the survey.

178 total views, 30 views today

Updated: January 19, 2017 — 11:26 pm

Oracle VM Server – Log Files

Why You Need Log Files?

Log files are keys to resolving problems in any IT system, why?! You are unable to troubleshooting without having log files.

Any enterprise system must have logging system and logging is very important to IT administrators.

Log location is very important for IT administrators even very importantly.

Oracle VM Server log files locations are listed in the following table:

Log FileDirectoryDescription
xend.log/var/log/xen/Contains a log of all the actions of the Oracle VM Server daemon. Actions are normal or error conditions. This log contains the same information as output using the xm log command.
xend-debug.log/var/log/xen/Contains more detailed logs of the actions of the Oracle VM Server daemon.
xen-hotplug.log/var/log/xen/Contains a log of hotplug events. Hotplug events are logged if a device or network script does not start up or become available.
qemu-dm.pid.log/var/log/xen/Contains a log for each hardware virtualized guest. This log is created by the quemu-dm process. Use the ps command to find the pid (process identifier) and replace this in the file name.
ovs-agent.log/var/log/Contains a log for Oracle VM Agent.
osc.log/var/log/Contains a log for Oracle VM Storage Connect plug-ins.
ovm-consoled.log/var/log/Contains a log for the Oracle VM virtual machine console.
ovmwatch.log/var/log/Contains a log for the Oracle VM watch daemon.

290 total views, 12 views today

Updated: January 13, 2017 — 10:17 pm

Oracle Help Center

Let me guess, you want to know something about Oracle Linux, you will google it!

Want to know something about Oracle VM, so you will google it but do you know that you can find all information about Oracle products in a library?

Yes, you can find many useful information or download them as different type of documents from Oracle Help Center.

There is some categories for all documents and you can find your documents faster:

  1. Cloud
  2. Application
  3. Middleware
  4. Database
  5. Big Data
  6. Enterprise Manager
  7. Engineered Systems
  8. Java
  9. Servers
  10. Networking
  11. Virtualization
  12. Storage
  13. Operating Systems
  14. Industries

Oracle Help Center

The help center is available on this link: https://docs.oracle.com/en/

Next time, go to the help center and search your product directly. I’m sure that you will find it faster and you can use updated and official information.

260 total views, 15 views today

Updated: January 13, 2017 — 8:29 pm

Oracle VM Server – Memory Size of the Management Domain (Dom0)

Oracle VM Server installer using the below algorithm to set default memory size for dom0:

dom0 Memory = 502 (MB) + (Physical Memory (MB) * 0.0205)

As an example, your physical server has 256 GB memory, dom0 needs to 5.7 GB memory.

If you didn’t assign enough memory to dom0, you will face with serious performance issues.

So calculating dom0 memory is very important for preventing performance issues on your virtual machines.

Also you can change dom0 memory size by the below instruction:

Edit your grub configuration on the Oracle VM Server to adjust the value for the dom0_mem parameter. If you are using UEFI boot, the grub configuration file is located at /boot/efi/EFI/redhat/grub.cfg, otherwise the grub configuration file is located at /boot/grub2/grub.cfg. Edit the line starting with multiboot2 /xen.gz and append the required boot parameters. For example, to change the memory allocation to 1024 MB, edit the file to contain:

284 total views, 18 views today

Updated: January 13, 2017 — 1:30 pm
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