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Apr
4
comment Can you run Docker natively on the new Windows 10 (Ubuntu) bash userspace?
It's not "just" a bash userspace. It's a real, fairly complete Linux userspace, but without X Windows i.e. text only. Saying "bash" communicates the text-only limitation quite well..
Apr
4
comment Can you run Docker natively on the new Windows 10 (Ubuntu) bash userspace?
And with Remote Desktop Services, the Session objects actively use these namespaces to provide concurrent operation. That doesn't mean you have all the required infrastructure, but major parts are there. As for chroot, realize that the Ubuntu environment already has a different root than the WIN32 one.
Apr
4
comment Can you run Docker natively on the new Windows 10 (Ubuntu) bash userspace?
Actually, Windows does have namespaces for Users, Mounts and IPC. User namespaces are required for Active Directory, mount namespaces and IPC namespaces are required for multi-user operation. Fundamentally, the kernel Object Manager in Windows has always had namespaces, from the very first Windows NT release, so it's not that strange.
Mar
31
comment RAID 10 - many slow disks vs fewer fast disks
Does it really matter whether ESXi supports SW RAID? It just needs to expose the disks to the guest VMs, and they can manage their software RAIDs. Sure, not as CPU-efficient as HW RAID, but the problem for HW RAID is that CPU performance is cheap.
Mar
31
comment RAID 10 - many slow disks vs fewer fast disks
@AshBurlaczenko: Don't compare capacity. The constraint here was IOPS, see TomTom's comment on the question and Sobrique's answer. This answer would suggest 8 HHD's for 304 IOPS. A single Samsung 950 Pro will do in excess of 30.000 IOPS.
Mar
31
comment RAID 10 - many slow disks vs fewer fast disks
@AshBurlaczenko: Because the poinf of using HDD's over SSD's is to save money. But here, the HDD solution has less IOPS for more $.
Feb
2
comment Linux: productive sysadmins without root (securing intellectual property)?
Note that the increased costs doesn't apply to every sysadmin action. However, it does apply to both the elevated actions themselves as well as their preparation. IOW, you can't say : "sysadmin works 40 hours a week, 4 of them elevated, so the cost increase would be only 10%". On the plus side, the scheme also catches normal, honest mistakes. That saves money.
Jan
3
comment Is it viable to run very lightweight services straight off a Raspberry Pi 2?
"If computers were much simpler, there would be less points of failure which in turn might improve stability" - A single HDD is definitely simpler than a RAID-5 array, but for stability you want RAID-5. Similar features missing from a RPi are ECC and redundant power supplies.
Oct
28
comment What happens if the DHCP server comes online after the client devices do?
Software by default does not "give up". If there's a loop while(not IP address) { send DHCP request; wait 30 seconds for DHCP response; } then the software will continue to send requests. And which programmer is not going to put in a loop? DHCP packages are occasionally lost or mangled, so you need to a retry capability. And there's really no point in artificially limiting the number of retries.
Oct
26
comment Unable to write to disk but disk isn't full
IIRC, too many files in a single directory will have similar if not identical symptoms. What "too many" is will vary between file systems.
Oct
26
comment Unable to write to disk but disk isn't full
@CarstenS: Or find . -name sess\* -delete which I find easier to remember, and is generally more efficient.
Sep
6
awarded  Caucus
Sep
6
awarded  Constituent
Aug
6
comment How to create a file root user can't delete
Formatting the entire disk is not "deleting the file" but you still lose the file. What you want (safeguard the file) is not what you would achieve by making the file non-deleteable.
Aug
5
comment What IP to use for self-testing?
@Shane: That's pretty much the same. "Connecting" starts by sending a SYN packet.
Aug
4
comment What IP to use for self-testing?
@Shane: 0.0.0.0 indeed means that, but only in contexts where it makes sense to talk about that collection. In particular, that makes sense when accepting new TCP connections or listening for UDP packets. Not for sending data.
Jul
21
comment Consumer (or prosumer) SSD's vs. fast HDD in a server environment
@DetlevCM: Remain readable until the first reboot at which they intentionally brick themselves. That in itself automatically disqualifies them for any serious use.
Jun
11
comment How does the DNS protocol switch from UDP to TCP?
Case (d) may be a wise choice if the query contains multiple "questions" (addresses to resolve). If you need to resolve 100 addresses, you're not going to be able to fit the response in a single UDP packet.
Jun
11
awarded  Yearling
Jun
9
answered How can you tell what a server actually does?