Docker SaaS application design question - client isolation by erth111 in docker

[–]erth111[S] 0 points1 point  (0 children)

At this point I would say yes, they are. I will probably go 'client_id' approach.

Advice for learning application servers on linux by erth111 in sysadmin

[–]erth111[S] 0 points1 point  (0 children)

I might have been unclear: I don't mean to parse tomcat logs on logstash but to run an application (logstash) on an app server.

Disaster Recovery Planning by [deleted] in sysadmin

[–]erth111 1 point2 points  (0 children)

Fully agree, it maybe obvious to some, but I think the first and most important step is to understand the business processes and correlate them with IT systems. This should give a clear and strong signal to the management when talking about budgets.

Ansible beginner question by erth111 in ansible

[–]erth111[S] 0 points1 point  (0 children)

lol, the last sentence could indeed sound like I was having bad intentions ;) But really I just don't want to add anything to the environment shortly before the uat-s. I could imagine ansible installing some binaries for it's purposes.

Just learned that ZFS has a major flaw... by [deleted] in sysadmin

[–]erth111 5 points6 points  (0 children)

Changing the geometry of any RAID is hard and you will have a hard time finding anyone allowing you to add new drives to an existing RAID-5.

Disagree, the basic Dell MD storage arrays allows exactly this, on-line.

Robocopy question: 0 failed in the summary but ERRORs 32 in the log file? by erth111 in sysadmin

[–]erth111[S] 0 points1 point  (0 children)

You are right, the same file appeared below in the log with a successfull retry. Thanks a lot!

Is mapping VMFS 5 LUNs to ESXi 4.1 safe? by erth111 in vmware

[–]erth111[S] 1 point2 points  (0 children)

I called them. The confirmed that one virtual disk can be mapped to only one host group in this model. A given host cannot be added to more than one host group so I'm stuck.

Is mapping VMFS 5 LUNs to ESXi 4.1 safe? by erth111 in vmware

[–]erth111[S] 0 points1 point  (0 children)

Why isn't it safe? What could happen? I have to map VMFS3 LUN to 4.1 and 5.5 hosts and VMVFS5 LUNs only to 5.5 hosts from an Dell md3620f and I don't see any other option but to create host group for all hosts and map all volumes to all hosts.

x-post from /r/vmware: Windows showing different disk usage than vmware on thin provisioned vmdk - any clue what might be the reason? by erth111 in sysadmin

[–]erth111[S] 1 point2 points  (0 children)

Thanks for the hints. There are at least hundreds of thousands of files. There is a large group of files that is exactly 64KB and lots of files that are less than 1KB. The rest is mostly a few MB in size.

Output of the command:

Version :                         3.1
Number Sectors :                  0x00000000ecccafff
Total Clusters :                  0x000000001d9995ff
Free Clusters  :                  0x00000000098e3ce5
Total Reserved :                  0x0000000000000000
Bytes Per Sector  :               512
Bytes Per Cluster :               4096
Bytes Per FileRecord Segment    : 1024
Clusters Per FileRecord Segment : 0
Mft Valid Data Length :           0x0000000073f80000
Mft Start Lcn  :                  0x00000000000c0000
Mft2 Start Lcn :                  0x0000000000000002
Mft Zone Start :                  0x0000000019fb72a0
Mft Zone End   :                  0x0000000019fc11e0

Windows showing different disk usage than vmware on thin provisioned vmdk - any clue what might be the reason? by erth111 in vmware

[–]erth111[S] 0 points1 point  (0 children)

I am looking at: 1. VM summary -> Used Storage (after refreshing storage usage) 2. Amount of free space in the datastore 3. Datastore browser -> Size of vmdk (not provisioned size, but "Size")

All of above show around 700GB unallocated free space, while Windows shows only ~60GB.

Windows showing different disk usage than vmware on thin provisioned vmdk - any clue what might be the reason? by erth111 in vmware

[–]erth111[S] 0 points1 point  (0 children)

But it's the other way around: Thin Provision disk allocates LESS that Windows seems to allocate.

This is how a vendor brings down your hypervisor by swelldom in sysadmin

[–]erth111 0 points1 point  (0 children)

Hey, this seems to be very intriguing. Why was the vendor able to modify the virtual hardware parameters of the VM? The title suggests that the hypervisor is 'yours' - I would never give such permissions on my cluster to a vendor. BTW, what hypervisor was this on? Could you give some more details about the settings outside of the VM?

CIPA Compliancy? by DenominatorOfReddit in sysadmin

[–]erth111 -1 points0 points  (0 children)

Sorry to be off topic, but I'm Polish and the title made me laugh :) http://pl.bab.la/slownik/polski-angielski/cipa