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• Cascading switches: uplink to uplink?

  - by wuckachucka

  I'm a bit confused as to why I haven't seen any references online to using Switch A's uplink port (1Gbps, 24-port 10/100) to connect to Switch B's uplink port: everything I've seen -- including documentation, forums, articles, etc. -- has Switch A's uplink port going to one of Switch B's 10/100 access ports. As I understand it, the Uplink port (besides greater speed normally) is no different than another port except that it's "internally crossed-over" so that you can use a straight cable with it. I've also seen documentation on using the uplink port to connect a switch to a gateway router, or even a server, as it provides greater bandwidth than the access ports, but yet not sure why nobody seems to be cross-uplinking, even when there's 2 uplink ports available on some higher-end switches. Switch in question is Linksys SRW224P (x2). Am I missing something?

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• How to configure Transparent IP Address Sharing (TAS) on a Mediatrix 4102 with DGW 2.0 firmware?

  - by Pascal Bourque

  I am making the switch to VoIP. I chose voip.ms as my service provider and Mediatrix 4102 as my ATA. One reason why I chose the Mediatrix over other popular consumer ATAs is that it's supposed to be easy to place it in front of the router, so it can give priority to its own upstream traffic over the home network's upstream traffic. This is supposed to work transparently, with the ATA and router sharing the same public IP address (the one obtained from the modem). They call this feaure Transparent IP Address Sharing, or TAS. Their promotional brochure describes it like this: The Mediatrix 4102 also uses its innovative TAS (Transparent IP Address Sharing) technology and an embedded PPPoE client to allow the PC (or router) connected to the second Ethernet port to have the same public IP address, eliminating the need for private IP addresses or address translations. I am interested by this feature because my router, an Apple Time Capsule, doesn't support QoS and cannot give priority to the voice packets if the ATA is behind the router. However, after hours of searching the web, reading the documentation, and good ol' trial and error, I haven't been able to configure the Mediatrix to run in this mode. Then I found a version of the manual that looks like it was for a previous version of the firmware (SIP), where there is an entire section dedicated to configuring TAS (starting at page 209). But my Mediatrix comes with the DGW 2.0 firmware, whose documentation does not mention TAS at all. So I tried to follow the TAS setup instructions from the SIP documentation and apply them to my DGW firmware, using the Variable Mapping Between SIP v5.0 and DGW v2.0 document as a reference, but no success. Some required SIP variables don't have an equivalent in DGW. So it looks like the DGW firmware does not support TAS at all, or if it does they are not doing anything to help us set it up. So right now, the Mediatrix is behind the router and VoIP works perfectly except when my upstream bandwidth is saturated. My questions are: Is downgrading to SIP firmware the only way to have my Mediatrix 4102 run in TAS mode? If not, anybody knows how to setup TAS on the DGW firmware? Is TAS mode the only way to give priority to the voice packets if I want to keep my current router (Apple Time Capsule)? Thanks!

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• Jenkins CI - Cannot allocate memory

  - by Programmieraffe

  I tested jenkins-ci successfully on a ubuntu 10.4 (with vmware fusion) on my local computer. Now I want to install and use it on my virtual server at hosteurope. The basic installation was no problem, but now I have problems with my build project. After pulling an mercurial update from a repository, ant is invoked and throws the following error in my build project: "Buildfile: /var/lib/jenkins/workspace/concrete5-seed-clean/build.xml [property] java.io.IOException: Cannot run program "/usr/bin/env": java.io.IOException: error=12, Cannot allocate memory" There is a known problem with heap size at virtual servers at hosteurope (http://faq.hosteurope.de/index.php?cpid=13918), so I tried to set the heap size manually: # for ant export ANT_OPTS="-Xms512m -Xmx512m" # jenkins # edited /etc/default/jenkins, added line JAVA_ARGS="-Xms512m -Xmx512m" # restarted jenkins via /etc/init.d/jenkins restart After setting this for ant, the command "ant -diagnostics" runs through and does not cause an error, but the error still occurs when I try to build the project. Server-Details: - http://www.hosteurope.de/produkt/Virtual-Server-Linux-L Ubuntu 10.4 LTS RAM: 1GB / Dynamic 2GB My questions: - Is 1GB enough for Jenkins or do I have to upgrade the server? - Is this error caused by ant or jenkins? Update: I got it running with ant options -Xmx128m -Xms128m, but sometimes the error occurs again. (this freaks me out, cause i can not reproduce it by now :/ ) Help much appreciated! Cheers, Matthias

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• How to force-restart a PC with vPro technology?

  - by Dan Nissenbaum

  I would like to know how to force-restart a PC that has crashed/hung and become completely non-responsive, using 2nd-generation vPro technology. Assume there is a second, fully responsive PC on the same LAN that can be accessed remotely to assist. Specifically, I am considering purchasing a PC with an i7-2860QM CPU, which is vPro-enabled (according to Intel). Here are two links that indicate it should be possible to force-restart a hung system with a 2nd-generation vPro-enabled CPU: Seconds 24-39 of What Is Intel vPro™ Technology? Page 17 (21 of the PDF) of Intel® vPro™ Technology: Reference Guide However, after extensive research, I cannot find a straightforward and trustworthy source of confirmation that this will actually work as I describe, or any documentation about how to set it up. I would appreciate both a reliable confirmation, and a source of documentation. This question is a follow-up to: Wake-on-LAN (WOL) fails after computer crashes (Windows 7 64-bit).

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• Splitting build cross the network?

  - by Dandikas

  Is there a known solution for splitting build process cross the network machines? Use case: We are an average software development company. We own around 50 development workstations (Quad Core 2.66Ghz, 4 GB ram, 200 GB raid). No need to tell that at any single moment not every machine is loaded to the max. There are 5 to 15 projects running simultaneously at any single moment. Obviously all of them are continuously build on server, than deployed to proper environment. Single project build is taking from 3 to 15 minutes. The problem: Whenever we build 5 projects in a row the last project is going to be ready after around 25 - 50 minutes. Building in parallel does not solve the problem (build is only a part of the game, than you need to deploy, run tests etc.) YES the correct solution is to add another build server, but "That involves buying new Expensive hardware, and we already spent a lot!". Yea, right(damn them)! Anyway. What about splitting build among developers workstation? Lets say whenever we need to build project "A" we check 5 workstations and start build on all that are not overloaded. The build can be canceled by a developer if he really needs all the power of his machine as long as there is at least 1 machine that is still building. After build is finished deployment can be performed to a proper environment (hosted on some server, not on workstation :) ). The bigger the company the more this makes sense to me. Anyone tried something like this? Are there any good practices? Any helpful software?

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• RHN Satellite / Spacewalk custom channels, best practice?

  - by tore-

  Hi, I'm currently setting up RHN Satellite, and all works well. I'm in the process of creating custom channels, since we have certain software which should be available for all nodes of satellite, e.g. puppet, facter, subversion, php (newer version than present in base). I've tried to find documentation on best practices on this. How should they be set up, how to handle different arch, how to handle noarch packages. How to sync updates to dependencies when updating a custom package in a custom channel (e.g. php is updated, how to fetch all updated dependencies). The channel management documentation from RHEL (http://www.redhat.com/docs/en-US/Red_Hat_Network_Satellite/5.3/Channel_Management_Guide/html/Channel_Management_Guide-Custom_Channel_and_Package_Management.html) doesn't provide me with enough information on how to solve any of theese issues. All tips, tricks and information regarding this would be great!

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• Problem in accessing Windows shared folder on Ubuntu using terminal

  - by vikramtheone

  Hi Guys, Description I have 2 systems with me, one running on Windows(Host) and one on Ubuntu, both on a LAN. On the Windows(Host) I develop software intended for the Linux system and because the Linux system has little external memory, my idea to overcome this is by making the project folder on the Host side a Shared Folder with full access and access it on Ubuntu over the network. To achieve this, I have installed Samba on Ubuntu, when I go to Places -> Network I can see the shared project folder and I simply mount it. A link appears on the desktop. Next, using Nautilus I open the link and I can access the contents of the shared folder. Problem Even though I mount the shared project folder, I don't see it appearing in the /media or the /mnt folder, as a result of this I don't know what path to use to access this folder, from the terminal. For example: When, I mounted my USB stick, as expected, a link for the device appears on the Desktop and I also see a folder in the media folder. So, similarly, a mounted shared folder should have appeared on the /mnt folder, too. Can anyone suggest what I should do now? There are many posts around, but no solid solution for this problem. Help!!! :) Vikram

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• Cisco ASA 5505 (8.05): asymmetrical group-policy filter on an L2L IPSec tunnel

  - by gravyface

  I'm trying to find a way to setup a bi-directional L2L IPSec tunnel, but with differing group-policy filter ACLs for both sides. I have the following filter ACL setup, applied, and working on my tunnel-group: access-list ACME_FILTER extended permit tcp host 10.0.0.254 host 192.168.0.20 eq 22 access-list ACME_FILTER extended permit icmp host 10.0.0.254 host 192.168.0.20 According to the docs, VPN filters are bi-directional, you always specify the remote host first (10.0.0.254), followed by the local host and (optionally) port number, as per the documentation. However, I do not want the remote host to be able to access my local host's TCP port 22 (SSH) because there's no requirement to do so -- there's only a requirement for my host to access the remote host's SFTP server, not vice-versa. But since these filter ACLs are bidirectional, line 1 is also permitting the remote host to access my host's SSH Server. The documentation I'm reading doesn't seem to clear to me if this is possible; help/clarification much appreciated.

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• apxs cannot install mod_cloudflare on centos

  - by Adam

  [ Linux - CentOS - Apache 2.2 - mod_cloudflare - apxs2 ] I have changed my nameservers to point to CloudFlare. The problem is that all the IP addresses are coming in as CloudFlare's. This is no good, because I have to monitor and block some specific traffic. mod_cloudflare is supposed to resolve this but I have been unable to get this installed. The command in the documentation uses apxs2. I can't figure out how to install this, or if it just means for 'apache 2.4'. I'm running 2.2.3, and I can use 'apxs'. When I run: apxs -aic mod_cloudflare.c I get the error apxs:Error: Command failed with rc=65536 Does this mean I need apxs2 or something else? How do I get mod_cloudflare working on my server? I appreciate any help, the documentation is vague and limited.

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• why do Vagrant docs suggest using public IP address 33.33.33.10 for local VMs?

  - by Gert

  I'm following a tutorial to set up vagrant (a tool to build and configure portable virtual machine images), and it seems that vagrant documentation suggests using IPv4 address 33.33.33.10 to configure a new box. That is a publicly routed IP adress, so I'm a bit confused why using this address is suggested. Since I don't own this network, I should not use an address from the 33.33.33.10/8 range. Am I correct in thinking that I should only use either a public address from a network I own, or an address from one of the private ranges as defined in RFC 1918? If so, why does Vagrant documentation suggest otherwise?

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• Determining Namespaces Not in the ACPI Spec

  - by Eddie B

  I am trying to determine how it may be possible to find documentation for namespaces that are not documented in the ACPI spec. I have an Asus uEFI BIOS v(3202) and I'm receiving kernel messages stating AE Namespace lookup failures for DSSP. This is referring to a namespace that is not in the ACPI spec. I'm presuming that this is vendor specific and refers to a Digital Sensor Signal Processor. That is only a presumption. In an effort to correct ACPI errors I have dumped my DSDT using acpidump and then decompiled it using iASL. Yet to fix the error I need to know the spec on the namespace. How can I get access to the BIOS documentation that isn't part of the ACPI spec?

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• Barriers to IPv6 deployment: addressing

  - by sysadmin1138

  There are several things that are keeping IPv6 deployment from being a topic of active discussion here at my work. There are the usual technical issues, but one non-technical one appears to be a major stumbling block on the path to actually getting a deployment project going. Addresses, memorizing of. Specifically, IPv4 addresses are comprehensible, and IPv6 addresses just look like a big long string of hex. The human mind has real trouble memorizing lists of more than 7-8 items, and an IPv4 address (192.168.231.148) has four items in it which makes it easy for us to memorize. A fully populated IPv6 address has not only 8 sections, but each section has 4 hex digits in it. IPv6 addresses were not designed for memorization. To the technician who knows that the DNS server is at 192.168.42.42 (or more likely "42.42", since the company prefix is likely memorized), the idea of memorizing an IPv6 address fills them with dread. Which in turn makes them much less enthusiastic about participating in an IPv6 deployment project. Because of how our network works we're not fully dynamic in terms of v4 addressing. We have several to many subnets that are entirely statically assigned for a variety of reasons, chief among them being that the overhead of static DHCP assignments is perceived as being too great. Also, some devices still aren't smart enough to pull DNS addresses out of DHCP while also having a static assignment, and therefore require manually configured DNS settings. Therefore, some v6 address memorization will have to be done. We're not under any mandate to get v6 out the door, so we don't have pressure from the top. However, it is time to start prepping our infrastructure to handle IPv6 even if we don't convert wholesale. For those of you who have been in IPv6-land for a while, what short-cut methods do you use to discuss or keep track of subnets and specific/critical IP addresses? If I can help reduce some of the dread surrounding IPv6 we might get the project going.

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• Time Machine vs Source Control?

  - by Blub

  Finally got convinced to start using some kind of version control for my code instead of zipping down a copy of the project at the end of each day. Downloaded Tortoise SVN and used it to create a repository localy on my hdd. I've been using it for 2 days now but I have to say that using it is actually more hassle than just copying the project manually in explorer. Sure, you only store incremental changes but with the cheap disks of today I can't really say that's an argument when you only have small projects. I haven't realy found a quick way to browse the older versions of my files eighter. What I want is an infinite undo that is completely transparent while I code, if I save the file I want a backup. I don't want to check out, check in and don't even get me started on moving files. I haven't tried Time Machine for OS X but it looks like it's exactly what I'm looking for. Does such a program exist for windows? Preferably free and with some kind of tagging-system so I can tag a timestamp when the project is working etc. Maybe should add that I mostly work alone on a single computer. Update: Some of you asked why I want backup. Since I work alone it's mostly to allow me to quickly hack up a solution without worrying that something will screw up.

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• gltail “Missing gem net-ssh”

  - by Ian

  I'm attempting to get gltail set up on my local system to monitor logs remotely. I've got all the dependencies installed, but when I go to run gltail ... ./gl_tail configfile ../config.yaml I get this output: Missing gem net-ssh. Ubuntu: sudo gem install -y net-ssh -r .. which I've done a number of times. Here is the output: dev@ubuntu:~/Desktop/Fudge-gltail-e5b252d/bin$ sudo gem install net-ssh Successfully installed net-ssh-2.0.15 1 gem installed Installing ri documentation for net-ssh-2.0.15... Installing RDoc documentation for net-ssh-2.0.15... But when I go to run it again, I get the same missing gem net-ssh error. dev@ubuntu:~/Desktop/Fudge-gltail-e5b252d/bin$ which ruby /usr/bin/ruby dev@ubuntu:~/Desktop/Fudge-gltail-e5b252d/bin$ which gem /usr/bin/gem Why isn't net-ssh being seen as properly installed?

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• Deploying a Django application in a virtual Ubuntu Server

  - by mfsaint

  I have a virtualbox machine running Ubuntu Server 10.04LTS. My intention is to this machine to work like a VPS, this way I can learn and prepare for when I get a VPS service. Apache+mod_wsgi for deploying the Django app seems the right choice to me. I have the domain (marianofalcon.com.ar) but nothing else, no DNS. The problem is that I'm pretty lost with all the deployment stuff. I know how to configure mod_wsgi(with the django.wsgi file) and apache(creating a VirtualHost). Something is missing and I don't know what it is. I think that I lack networking skills ant that's the big problem. Trying to host the app on a virtualbox adds some difficulty because I don't know well what IP to use. This is what I've got: file placed at: /etc/apache2/sites-available: NameVirtualHost *:80 <VirtualHost *:80> ServerAdmin [email protected] ServerName www.my-domain.com ServerAlias my-domain.com Alias /media /path/to/my/project/media DocumentRoot /path/to/my/project WSGIScriptAlias / /path/to/your/project/apache/django.wsgi ErrorLog /var/log/apache2/error.log LogLevel warn CustomLog /var/log/apache2/access.log combined </VirtualHost> django.wsgi file: import os, sys wsgi_dir = os.path.abspath(os.path.dirname(__file__)) project_dir = os.path.dirname(wsgi_dir) sys.path.append(project_dir) project_settings = os.path.join(project_dir,'settings') os.environ['DJANGO_SETTINGS_MODULE'] = 'myproject.settings' import django.core.handlers.wsgi application = django.core.handlers.wsgi.WSGIHandler()

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• Purpose of JBoss tables

  - by Rich

  Hi Can anyone point me in the direction of some documentation (or provide the information here) about the following tables, created by JBoss 5.1.0 when it starts up? I know what they are for at a high level, and know why they are there, but I could do with some lower-level documentation about each table's purpose. The tables are: hilosequences timers jbm_counter jbm_dual jbm_id_cache jbm_msg jbm_msg_ref jbm_postoffice jbm_role jbm_tx jbm_user I know that the first two are associated with uuid-key-generator and the EJB Timer Service respectively, while the rest are associated with JBoss Messaging. What I want to know is something along the lines of "jmg_msg stores each message when it is created...", that kind of thing. I wasn't sure where to ask this question, ServerFault or StackOverflow, but I decided it wasn't programming related so thought I should put it here - I hope that's ok! Thanks Rich

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• Where can I find details on installing and using Solr on Tomcat using the solr-common and solr-tomcat packages?

  - by danieltalsky

  I'm seeing lots of Solr/Tomcat installation instructions, but all of them install at least one of these packages from source. Since there's tomcat6, solr-common, and solr-tomcat packages (in Ubuntu 10.4), I'd love to use them, but I can't find any kind of documentation on installing using them. I can't even tell what directory solr is stored in. I get a "Welcome to Solr!" page at http://localhost:8080/solr/, but have no idea where the catalina home is, or where the solr configuration files are in this case. Can anyone point me to documentation?

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• How can transfer zabbix item from different hosts and save item statistic

  - by Stepchik

  There are two server's (srv1 and srv2). Mysql server has been installed on which of them. Srv1 mysql contains database (db1). Zabbix-server get statistic throw configured agent user parameter (https://www.zabbix.com/documentation/2.0/manual/config/items/userparameters). Yesterday i has been copyed database db1 from mysql srv1 to mysql srv2. I can clone zabbix server item (https://www.zabbix.com/documentation/2.0/manual/config/items) to srv2, but lost all srv1 db1 statistic. Can you advice how keep them?

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• Allow different headers on different servers using WFF

  - by Brian

  We've got multiple web servers configured in a cluster using Microsoft's Web Farm Framework. One of the things I like to do to help debugging is to create a header in IIS that identifies the server that handled the request. Unfortunately when I try to do this, WFF sets the headers to the same value on all the servers. Is there a way around this? I tried looking into using skipDirectives, but I can't find any documentation on it (other than a little bit showing how to use it to skip directories and bindings). If there is documentation on this, please link to it! I would like to be able to read up more on it in case I need to do other things as well.

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• Pervasive database backup

  - by Steven

  I'm looking for the best way to backup my pervasive database. I've read the documentation but still have a few questions. It appears that Continuous Operations method only allows me to backup the entire database? So I'd do butil -startbu @filelist, then backup the entire database (copy, rsync, etc), then run butil -endbu @filelist. Looking through the documentation I don't see a way to get transaction logs out of this method; like I would do for MSSQL (BACKUP LOG ACCT TO DISK) or Postgres (archive_command). With rsync, it might be feasible to still do this every 15 minutes. The Archival Logging method means I would have to occasionally stop the database to get a full backup, which is acceptable for me. But can I copy the log files off of the server every 15 minutes, ie log shipping? Thank you.

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• Replacement for public folder workflow, I'm confused as to how sharepoint does it.

  - by RodH257

  For years Microsoft has been slowly phasing out public folders, perhaps exchange 2010 really is the LAST TIME they'll be shipped... I've heard sharepoint is the replacement, but I don't understand full, can someone give me an idea of how to replace this workflow? In our office, we have projects, they have a project number, ie 10353. Each job folder has a public folder, organized in a hierachy like Projects Year Folder Subfolders The main subfolder we use is for genera correspondence. When an email is received that relates to a project, it is dragged and dropped (or right click move to) a public folder. Adding public folder favourites for each user helps this. When an email is sent, we have a custom email form, which is the default email form, but with a project number field next to the subject line. When you enter the job number in there, it carbon copies our filing system in, which reads the job number and puts the email in the public folder for you. if you need to refer to emails, you go to public folder and find them there. This isn't the best with large jobs, but it works ok. Now, I have limited experience with sharepoint (well, WSS), we've used it to do some neat discussion boards/polls etc as an intranet site, but I haven't seen much of its integration with outlook. The great thing about our solution is how tightly it integrates with outlook which is exactly where the emails are. If you want to forward an old email, you go to public folder and forward it, simple. Any solution that replaces it should be at least as easy as this. Improvements we would like would be to have better searching of emails, better support in exchange (ie future version) and also, custom forms in outlook are being phased out (the VBA kind), so avoiding these would be good. Does sharepoint do this? or what solutions do this kind of thing?

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• Protect all XML-RPC calls with HTTP basic auth but one

  - by bodom_lx

  I set up a Django project for smartphone serving XML-RPC methods over HTTPS and using basic auth. All XML-RPC methods require username and password. I would like to implement a XML-RPC method to provide registration to the system. Obviously, this method should not require username and password. The following is the Apache conf section responsible for basic auth: <Location /RPC2> AuthType Basic AuthName "Login Required" Require valid-user AuthBasicProvider wsgi WSGIAuthUserScript /path/to/auth.wsgi </Location> This is my auth.wsgi: import os import sys sys.stdout = sys.stderr sys.path.append('/path/to/project') os.environ['DJANGO_SETTINGS_MODULE'] = 'project.settings' from django.contrib.auth.models import User from django import db def check_password(environ, user, password): """ Authenticates apache/mod_wsgi against Django's auth database. """ db.reset_queries() kwargs = {'username': user, 'is_active': True} try: # checks that the username is valid try: user = User.objects.get(**kwargs) except User.DoesNotExist: return None # verifies that the password is valid for the user if user.check_password(password): return True else: return False finally: db.connection.close() There are two dirty ways to achieve my aim with current situation: Have a dummy username/password to be used when trying to register to the system Have a separate Django/XML-RPC application on another URL (ie: /register) that is not protected by basic auth Both of them are very ugly, as I would also like to define a standard protocol to be used for services like mine (it's an open Dynamic Ridesharing Architecture) Is there a way to unprotect a single XML-RPC call (ie. a defined POST request) even if all XML-RPC calls over /RPC2 are protected?

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• Protect all XML-RPC calls with HTTP basic auth but one

  - by bodom_lx

  I set up a Django project for smartphone serving XML-RPC methods over HTTPS and using basic auth. All XML-RPC methods require username and password. I would like to implement a XML-RPC method to provide registration to the system. Obviously, this method should not require username and password. The following is the Apache conf section responsible for basic auth: <Location /RPC2> AuthType Basic AuthName "Login Required" Require valid-user AuthBasicProvider wsgi WSGIAuthUserScript /path/to/auth.wsgi </Location> This is my auth.wsgi: import os import sys sys.stdout = sys.stderr sys.path.append('/path/to/project') os.environ['DJANGO_SETTINGS_MODULE'] = 'project.settings' from django.contrib.auth.models import User from django import db def check_password(environ, user, password): """ Authenticates apache/mod_wsgi against Django's auth database. """ db.reset_queries() kwargs = {'username': user, 'is_active': True} try: # checks that the username is valid try: user = User.objects.get(**kwargs) except User.DoesNotExist: return None # verifies that the password is valid for the user if user.check_password(password): return True else: return False finally: db.connection.close() There are two dirty ways to achieve my aim with current situation: Have a dummy username/password to be used when trying to register to the system Have a separate Django/XML-RPC application on another URL (ie: /register) that is not protected by basic auth Both of them are very ugly, as I would also like to define a standard protocol to be used for services like mine (it's an open Dynamic Ridesharing Architecture) Is there a way to unprotect a single XML-RPC call (ie. a defined POST request) even if all XML-RPC calls over /RPC2 are protected?

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• Meaning of Bridge-Check in iptables flowchart

  - by networkIT

  In the famous iptables flow-chart what does bridge-check exactly stands for ? I couldn't find any documentation. The only clue I found was while scanning the MikroTik RouterOS documentation ( RouterOS is build upon a Linux 2.6.16 kernel ), I found this : In-interface Bridge = Checks if the input interface is a port for a bridge or is the bridge. Manual:Packet Flow Comparing both flow-charts brings clues that iptables Bridge-check might equal MikroTik In-Interface Bridge. Is this true ? Else, what might be the meaning of iptables Bridge-Check ?

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• Is memcached pre-installed with Xcode on OS X?

  - by GeneQ

  The answer seems to be yes, according to Apple's documentation. To make sure I'm not hallucinating, I checked Apple's developer tools documentation. Yes, memcached is supported and documented by Apple: Apple Developer Library : memcached(1) Apparently, memcached is installed with Xcode since at least 10.6 onwards. The reason I'm asking this is that on the Web and on SO there are lots people asking how to install memcached on OS X but curiously no one seems to mention that the easiest way to do so is to simply install Xcode via the AppStore (or using a DMG). All the answers given involves using homebrew or some other complicated way to install memcached from source. Is there any compelling reason why the Apple shipped memcached is not good enough? I don't see any advantages of compiling and installing memcached from source since there's an Apple supported version.

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