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  • vmware esx licensing limit on vCPUs per VM

    - by maruti
    when a server has more than 8 cores per CPU (total 16 logical procs) and ESX standard license is applied, what does it mean for VM performance? Since each VM on host is allowed only 4 vCPUs max VMWare ESX/ESXi limits the no of vCPUs per guest VM depending on the license: standard Lic = 4 vCPU Advanced Lic = 4 since i dont know exact number is there need to upgrade to Advanced version for any perf benefits if none of VMs have workloads that need more than 4 vCPUs?

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  • Debian virtual memory reaching limit

    - by Gregor
    As a relative newbie to systems, I inherited a Debian server and I've noticed that virtual memory is very high (around 95%!). The server has been running slow for around 6 months, and I was wondering if any of you had any tips on things I could try, particularly on freeing up memory. The server hosts various websites and also a Postit email server. Here are the details: Operating system Debian Linux 5.0 Webmin version 1.580 Time on system Thu Apr 12 11:12:21 2012 Kernel and CPU Linux 2.6.18-6-amd64 on x86_64 Processor information Intel(R) Core(TM)2 Duo CPU E7400 @ 2.80GHz, 2 cores System uptime 229 days, 12 hours, 50 minutes Running processes 138 CPU load averages 0.10 (1 min) 0.28 (5 mins) 0.36 (15 mins) CPU usage 14% user, 1% kernel, 0% IO, 85% idle Real memory 2.94 GB total, 1.69 GB used Virtual memory 3.93 GB total, 3.84 GB used Local disk space 142.84 GB total, 116.13 GB used Free m output: free -m total used free shared buffers cached Mem: 3010 2517 492 0 107 996 -/+ buffers/cache: 1413 1596 Swap: 4024 3930 93 Top output: top - 11:59:57 up 229 days, 13:38, 1 user, load average: 0.26, 0.24, 0.26 Tasks: 136 total, 2 running, 134 sleeping, 0 stopped, 0 zombie Cpu(s): 3.8%us, 0.5%sy, 0.0%ni, 95.0%id, 0.7%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 3082544k total, 2773160k used, 309384k free, 111496k buffers Swap: 4120632k total, 4024712k used, 95920k free, 1036136k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 28796 www-data 16 0 304m 68m 6188 S 8 2.3 0:03.13 apache2 1 root 15 0 10304 592 564 S 0 0.0 0:00.76 init 2 root RT 0 0 0 0 S 0 0.0 0:04.06 migration/0 3 root 34 19 0 0 0 S 0 0.0 0:05.67 ksoftirqd/0 4 root RT 0 0 0 0 S 0 0.0 0:00.00 watchdog/0 5 root RT 0 0 0 0 S 0 0.0 0:00.06 migration/1 6 root 34 19 0 0 0 S 0 0.0 0:01.26 ksoftirqd/1 7 root RT 0 0 0 0 S 0 0.0 0:00.00 watchdog/1 8 root 10 -5 0 0 0 S 0 0.0 0:00.12 events/0 9 root 10 -5 0 0 0 S 0 0.0 0:00.00 events/1 10 root 10 -5 0 0 0 S 0 0.0 0:00.00 khelper 11 root 10 -5 0 0 0 S 0 0.0 0:00.02 kthread 16 root 10 -5 0 0 0 S 0 0.0 0:15.51 kblockd/0 17 root 10 -5 0 0 0 S 0 0.0 0:01.32 kblockd/1 18 root 15 -5 0 0 0 S 0 0.0 0:00.00 kacpid 127 root 10 -5 0 0 0 S 0 0.0 0:00.00 khubd 129 root 10 -5 0 0 0 S 0 0.0 0:00.00 kseriod 180 root 10 -5 0 0 0 S 0 0.0 70:09.05 kswapd0 181 root 17 -5 0 0 0 S 0 0.0 0:00.00 aio/0 182 root 17 -5 0 0 0 S 0 0.0 0:00.00 aio/1 780 root 16 -5 0 0 0 S 0 0.0 0:00.00 ata/0 782 root 16 -5 0 0 0 S 0 0.0 0:00.00 ata/1 783 root 16 -5 0 0 0 S 0 0.0 0:00.00 ata_aux 802 root 10 -5 0 0 0 S 0 0.0 0:00.00 scsi_eh_0 803 root 10 -5 0 0 0 S 0 0.0 0:00.00 scsi_eh_1 804 root 10 -5 0 0 0 S 0 0.0 0:00.00 scsi_eh_2 805 root 10 -5 0 0 0 S 0 0.0 0:00.00 scsi_eh_3 1013 root 10 -5 0 0 0 S 0 0.0 49:27.78 kjournald 1181 root 15 -4 16912 452 448 S 0 0.0 0:00.05 udevd 1544 root 14 -5 0 0 0 S 0 0.0 0:00.00 kpsmoused 1706 root 13 -5 0 0 0 S 0 0.0 0:00.00 kmirrord 1995 root 18 0 193m 3324 1688 S 0 0.1 8:52.77 rsyslogd 2031 root 15 0 48856 732 608 S 0 0.0 0:01.86 sshd 2071 root 25 0 17316 1072 1068 S 0 0.0 0:00.00 mysqld_safe 2108 mysql 15 0 320m 72m 4368 S 0 2.4 1923:25 mysqld 2109 root 18 0 3776 500 496 S 0 0.0 0:00.00 logger 2180 postgres 15 0 99504 3016 2880 S 0 0.1 1:24.15 postgres 2184 postgres 15 0 99504 3596 3420 S 0 0.1 0:02.08 postgres 2185 postgres 15 0 99504 696 628 S 0 0.0 0:00.65 postgres 2186 postgres 15 0 99640 892 648 S 0 0.0 0:01.18 postgres

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  • Trying to limit IMAP folders/mailboxes my iPhone/iPad sees

    - by QuantumMechanic
    (Note: I am using dovecot 1.0.10 on Ubuntu 8.04.4 LTS. Yes, I know I need to upgrade before next year :) (Note: The SMTP/IMAP server in question only serves my family, so there's only a very few users. Certainly what I propose below, even it it works, would be a logistical nightmare with any significant number of users). I have noticed (and have confirmed via google) that the iOS mail app is terrible in its handling of IMAP subscriptions, namespaces, etc. For example, my iPhone and iPad will see EVERYTHING (all mailboxes, folders, etc.), whereas clients like Thunderbird, alpine, etc. only see what I tell them to see. This makes it an incredible pain to move mail between mailboxes because I have to scroll through a gazillion things. The mail_location in dovecot.conf is: mail_location = mbox:%h/Mail/:INBOX=/var/mail/%u To get around this, I've been considering doing the following for user foo: Create a dovecot userdb with a foo-ios virtual user in it, whose UID is identical to that of the real (in /etc/passwd) foo user and with a homedir of /home/foo-ios. ln -s /var/mail/foo /var/mail/foo-ios mkdir -p /home/foo-ios/Mail cd /home/foo-ios/Mail ln -s /home/foo/Mail/mailbox-i-want-visible mailbox-i-want-visible Make symlinks for the rest of limited set of mailboxes/folders I want visible to the iOS mail app. chown -R foo:foo /home/foo-ios Change iOS mail app settings to log in as user foo-ios instead of user foo. Will this work or will there be some index/file corruption hell because there will be two sets of indexes (one set living in /home/foo/Mail/.imap and other set living in /home/foo-ios/Mail/.imap) indexing the same underlying mbox files? And I'd be more than happy to hear of a better way to do this with dovecot! (Or to hear that dovecot 2.x works better with iOS devices).

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  • Limit of dvd rom

    - by user23950
    I have lite on dvd rom. And I'm going to copy lots of files from maybe 40-70 dvd's. And I'm using this dvd rom for about 4-7 months now. And I have also burned lots of dvd's. and I've copied the 2nd dvd. But the rom is making sound. A sound that I do not hear frequently. Does it depend on the dvd's that I'm reading or my dvd rom is getting old. How many dvd's do you think the rom can copy without threatening its health

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  • iMac memory limit

    - by Mike
    I have an iMac that was from the first generation of aluminum iMacs. The reported model is "iMac 7,1". This iMac's manual says I can put 2 2GB modules, but when this manual was made we don't have modules with more than 2GB and also we had Leopard then, that I suppose can handle less memory than Snow leopard. Today we have 4GB modules, so can I put two 4GB modules and make it 8GB? thanks.

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  • Removing files on a limit access backup server

    - by Bart van Heukelom
    I have an account on a backup server but it's full, so I need to clear it. The problem is that It's only accessible via FTP, SFTP and Rsync (no shell) Deleting lots of small files (as in, multiple full Linux installations), which I have to do, is undoable over FTP/SFTP because it cannot recursively delete directories in one command (Yes, most clients will fake this by issueing all the seperate commands for you but the overhead is huge and the process takes several days...well it crashes before that). What do I do?

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  • Increasing Screen Resolution to more than limit and scaling to origional

    - by Akshat Mittal
    I have a laptop, with Screen Resolution - 1366x768 (most common) - I want to increase it further to 1600x900 (or higher), in the same ratio. I want to scale the higher resolution on my current screen to fit it. I found xrandr with command xrandr --output LVDS1 --scale 1.4x1.4, this worked but again resulted to another problem, it does the scaling thing but the cursor is still blocked into the native screen resolution and I am not able to move it further, I found that the bug is already filed here. Also this command was only for Linux, I wanted to do this thing with both Linux and Windows (including Windows 8). I want a similar software that is bug free (at least not a major bug like this) and that supports Windows as well (or two separate software for Windows and Linux). Any help is appreciated and Thanks in advance.

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  • Setting charging limit on MBP?

    - by Giannis
    Is it possible to tweak settings so that the battery will only charge up to 90% -95% and then use power adapter to run ? A friend told me he was able to set such limits on his non-mac PC so I was hoping there would be a way to do it. From reading I have done online it appears this is better than having a 100% battery most of the time. I have an MBP 13" 2012 running latest version of OSX ML(10.8.2).

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  • telnet - is there a maximum line limit?

    - by benc
    I am working on several servers that use HTTP for transport of commands. What I have encountered is that some of the commands I am trying to issue by hand are very long GETs, several lines, and that when I telnet from my Mac to my Solaris system, I cannot seem to cut and paste the line successfully. I get a couple bounching sounds (which I assume is a control-g - bell) and then it never pastes everything. From trying to break it up into smaller pieces, I am getting the impression that TELNET, or my bundled telnet client or server has a maximum line length that I had never bumped into. I did some googling and superusering, but did not find anything definitive.

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  • php registration form - limit emails [closed]

    - by Daniel
    i want to restrict certain emails to my website. an example would be that i only want people with gmail accounts to register to my website. { /* Check if valid email address */ $regex = "^[_+a-z0-9-]+(\.[_+a-z0-9-]+)*" ."@[a-z0-9-]+(\.[a-z0-9-]{1,})*" ."\.([a-z]{2,}){1}$"; if(!eregi($regex,$subemail)){ $form->setError($field, "* Email invalid"); } $subemail = stripslashes($subemail); } this is what i have so far to check if its a valid email.

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  • Limit user to one CPU core in windows 7

    - by Dean Ward
    I let my family members use my pc over rdp to play their flash-based games as their laptops overheat if they use them directly. I have it setup so I can use the pc at the same time as them. The pc has a quad core cpu and I would like to be able to assign one of those cores to the user logged in via RDP so that the other 3 cores are left alone. Is this possible? They login via a specific user account setup for the purpose. Thanks for any advice!

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  • Hardware imposed 32-bit limit

    - by knittl
    i'm thinking about converting my OS (ubuntu) to the 64 bit version to use the last bit of memory (4 gb)—ok, it's rather reinstalling … will this work as expected or are there possible limits given by the mainboard/memory controller/some other component, so i cannot fully utilize my full ram? if so, are there benefits from upgrading anyway?

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  • Hardware imposed 32-bit limit

    - by knittl
    i'm thinking about converting my OS (ubuntu) to the 64 bit version to use the last bit of memory (4 gb)—ok, it's rather reinstalling … will this work as expected or are there possible limits given by the mainboard/memory controller/some other component, so i cannot fully utilize my full ram? if so, are there benefits from upgrading anyway?

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  • Triple-Boot + 4 partition Limit

    - by dsimcha
    I just bought a new hard drive so that I could convert my XP-only machine into an XP-Ubuntu-Windows 7 triple boot machine. Since the drive is absurdly huge (1 TB) I wouldn't mind throwing ReactOS into the mix, too. I just found out that master boot records are limited to 4 entries, meaning 4 primary partitions. I had Windows XP set up on my old drive as a boot partition, a program files partition and a media partition. Since I really didn't want to install XP from scratch, I cloned this setup on my new drive. This leaves me one MBR partition entry for installing Windows 7, Ubuntu and ReactOS. I'd like to avoid having to install XP from scratch like the plague, partly because it's supposed to be a safety net in case things go wrong with my other OS's and because I've invested a lot of time getting it set up exactly the way I like it. Here are the options I've considered and why I don't like them: Install Windows 7 on my media partition. This would work, but I prefer to keep my media partition completely separate from any OS, so that I can reformat an OS partition without affecting my media partition at all. Use wubi or something to install Ubuntu in the same partition as something else. Again, this is brittle. Move all my media to a logical drive on an extended partition. Create another logical drive on this extended partition for Ubuntu. The problem here is that extended partitions are rather brittle--if you nuke one, it renders the rest useless. Just put the old drive back in my computer and run XP off it. Use the new one for the other OS's. The problem here is that the old drive is slower and uses extra power, generates extra heat, etc. Can anyone suggest any other possibilities that I may have overlooked?

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  • How to limit reverse SSH tunelling ports?

    - by funktku
    We have a public server which accepts SSH connections from multiple clients behind firewalls. Each of these clients create a Reverse SSH tunnel by using the ssh -R command from their web servers at port 80 to our public server. The destination port(at the client side) of the Reverse SSH Tunnel is 80 and the source port(at public server side) depends on the user. We are planning on maintaining a map of port addresses for each user. For example, client A would tunnel their web server at port 80 to our port 8000; client B from 80 to 8001; client C from 80 to 8002. Client A: ssh -R 8000:internal.webserver:80 clienta@publicserver Client B: ssh -R 8001:internal.webserver:80 clientb@publicserver Client C: ssh -R 8002:internal.webserver:80 clientc@publicserver Basically, what we are trying to do is bind each user with a port and not allow them to tunnel to any other ports. If we were using the forward tunneling feature of SSH with ssh -L, we could permit which port to be tunneled by using the permitopen=host:port configuration. However, there is no equivalent for reverse SSH tunnel. Is there a way of restricting reverse tunneling ports per user?

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  • Windows Server 2008 R2 Maximum Processor Limit Confusion

    - by Stevoni
    As I was looking through the Windows Server 2008 R2 specifications, I saw that the maximum supported processors is 64 sockets for Datacenter addition. This puts the maximum number or cores at 256 (if all sockets are quad cores), which I think it's just silly, but whatever. And now the questions: How does one set something like that up? (Obviously not for me, but humor me) Are there multiple dual socket motherboards running in a giant case with a ton of memory? How does the OS see all of the CPUs if they're on different boards? What would be a real world example of a need to have 64 sockets attached to one operating system vs 32 2 socket servers?

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  • What are ways to prevent files with the Right-to-Left Override Unicode character in their name (a malware spoofing method) from being written or read?

    - by galacticninja
    What are ways to avoid or prevent files with the RLO (Right-to-Left Override) Unicode character in their name (a malware method to spoof filenames) from being written or read in a Windows PC? More info on the RLO unicode character here: http://www.fileformat.info/info/unicode/char/202e/index.htm http://en.wikipedia.org/wiki/Bi-directional_text Info on the RLO unicode character when used by malware: http://www.ipa.jp/security/english/virus/press/201110/E_PR201110.html Mirror link: http://webcache.googleusercontent.com/search?q=cache:KasmfOvbVJ8J:www.ipa.jp/security/english/virus/press/201110/E_PR201110.html+&cd=1&hl=en&ct=clnk You can try this RLO character test webpage: http://www.fileformat.info/info/unicode/char/202e/browsertest.htm The RLO character is also already pasted in the 'Input Test' field in that webpage. Try typing there and notice that the characters you're typing are coming out in their reverse orders (right-to-left, instead of left-to-right). In filenames, the RLO character can be specifically positioned in the filename to spoof or masquerade as having a filename or file extension that is different than what it actually has. (Will still be hidden even if 'Hide extensions for known filetypes' is unchecked.) The only info I can find that has info on how to prevent files with the RLO character from being run is from the Information Technology Promotion Agency, Japan website: http://www.ipa.jp/security/english/virus/press/201110/E_PR201110.html (Mirror link). They adviced to use the Local Security Policy settings manager to block files with the RLO character in its name from being run. Can anyone recommend any other good solutions to prevent files with the RLO character in their names from being written or being read in the computer, or a way to alert the user if a file with the RLO character is detected? My OS is Windows 7, but I'll be looking for solutions for Windows XP, Vista and 7, or a solution that will work for all those OSes, to help people using those OSes too.

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  • Limit unix users file access

    - by Michael
    Hello, I just created a new user on my server, but I only want this user to have access to var/www/ and all the files/folders inside that. They should be able to access no other files on the server except those. How would I do this? Thanks!

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  • Limit access on Apache 2.4 to ldap group

    - by jakobbg
    I've upgraded from Ubuntu 12.04 LTS to 14.04 LTS, and suddenly, my Apache 2.4 (previous: Apache 2.2) now lets everybody in to my virtual host, which is unfortunate :-). What am I doing wrong? Anything with the Order/Allow lines? Any help is greatly appreciated! Here's my current config; <VirtualHost *:443> DavLockDB /etc/apache2/var/DavLock ServerAdmin [email protected] ServerName foo.mydomain.com DocumentRoot /srv/www/foo Include ssl-vhosts.conf <Directory /srv/www/foo> Order allow,deny Allow from all Dav On Options FollowSymLinks Indexes AllowOverride None AuthBasicProvider ldap AuthType Basic AuthName "Domain foo" AuthLDAPURL "ldap://localhost:389/dc=mydomain,dc=com?uid" NONE AuthLDAPBindDN "cn=searchUser, dc=mydomain, dc=com" AuthLDAPBindPassword "ThisIsThePwd" require ldap-group cn=users,dc=mydomain,dc=com <FilesMatch '^\.[Dd][Ss]_[Ss]'> Order allow,deny Deny from all </FilesMatch> <FilesMatch '\.[Dd][Bb]'> Order allow,deny Deny from all </FilesMatch> </Directory> ErrorLog /var/log/apache2/error-foo.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /var/log/apache2/access-foo.log combined </VirtualHost>

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  • Limit WSUS replication to only certain product classifications

    - by MDMarra
    I have four WSUS 3.0 SP2 servers that are geographically distributed. The server at our main site (we'll call it WSUS1), is the main WSUS server. All manual and auto-approvals happen here. The other three WSUS servers are replicas of this server. Currently, we are only controlling desktop OS updates through WSUS. I would like to control server OS updates through WSUS as well. There is no need for all of these server updates to be on WSUS servers at the remote sites. The only server that would need a copy of them is WSUS1. Is there a way to keep my current infrastructure as-is and add server OS updates only to WSUS1, even though the others are set up as replicas, or will I need to configure an additional WSUS server that's not replicated?

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  • MySQL Memory Limit Windows Server 2003

    - by Matt
    I am running MySQL 5.0.51a on Windows Server 2003 Standard Edition on an HP DL580 G4 with 3GB installed. One of my database tables has grown to 5.3 GB with an index file of 2.5 GB, which I believe is causing MySQL to be slow due to having to constantly load and unload the index file when updates are made to the table. The server itself seems to be performing OK because MySQL is only using about 500MB of memory (there are other apps running on the system, but MySQL uses the most memory). The table is fairly active with new records getting adding all during day but no deletes, ever. The MySQL server has up to 600 connections allowed, but only small number (10 or 20) would actually be writing to this table. I increased the memory limits in MySQL but since the max connections is so high I don't think I can give each connection 1GB without risking a problem. Is there some tuning that would let just certain connections get a lot of memory? So I have started to look for alternatives to avert the crisis I know is coming soon. Some of the options I have: Upgrade to Server 2003 Enterprise to install 64GB of memory. Question: would 32 bit MySQL be able to access more than 2GB? Would that be 2GB per thread? That would still be smaller than the index table size so it might not solve the problem completely, but it would be better than now. Upgrade to Server 200x 64 bit and MySQL 64 bit. Switch to a *nix 64 bit server. If anybody has suggestions for things to do in the meantime, opinions on which way to go, or other things that I have overlooked I would appreciate the help. Thanks

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