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• With the Supermicro Embeded BMC, is it possible to connect to Serial Over Lan via SSH?

  - by Stefan Lasiewski

  I have several dozen Supermicro servers which use the Supermicro Embedded BMC. The documentation on that page suggests that I can access the Serial Over LAN (Serial Console) over SSH: SMASH and CLP support SSH based SOL Power control of the server But when I ssh into my BMC, all I see is a Busybox implementation, with no clear ability to connect to the SOL: # ssh 192.168.100.100 -l ADMIN [email protected]'s password: BusyBox v1.1.3 (2011.02.12-01:48+0000) Built-in shell (ash) Enter 'help' for a list of built-in commands. # show -sh: show: not found # smash -sh: smash: not found Supermicro support is giving me inconsistent answers. Is it possible to connect to the SOL via the SSH interface?

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• Choosing between a dedicated and virtual dedicated server for my startup

  - by MarathonStudios

  I'm about to launch a startup site I've been working on for some time, and I'm just now looking over hosting plans. The site's main feature is fairly processor-heavy (a lot of text processing), so I probably need something other then shared hosting to ensure I don't get shut down for overusing resources. I would like to spend as little as possible on hosting until the site starts generating income, so under-$60/mo is my goal. One caveat is that I need a Windows box for this particular site, so it's harder to get a good deal. For that price, I can either get a bottom-tier dedicated (2gigs ram, pentium 4) or a middle-tier VPS (3gb RAM, a bit more traffic and HD) for a few bucks more per month. I had a bad experience with a low-end VPS a few months ago, so making sure that whatever I get can handle the basic traffic of a website as well as giving me what I need (extra processing power) is essential. Do you have any suggestions as to which way to go, or a certain hosting company you've worked with that you can recommend?

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• NX Client running on OS X 10.6.3 => NX Server Ubuntu 10.04: weird keymapping issue

  - by Mike D

  I have been using Ubuntu 9.10 at work after switching from vista. After being (expectedly) disappointed with performance over VNC (via VPN) when logging in from home, I came across the NOMACHINE suite. Last week, I upgraded from OS X 10.6.2 = 10.6.3 at home. After that, I also updated my NX Client at home to the latest version, as there were issues with recent changes in the OSX X11 setup that rendered the NX connection useless. At that point, everything worked fine. Fast forward, I upgraded from 9.10 = 10.04 on my work machine the next day, and after coming home and trying to log-in remotely, I noticed that the "s" and "m" keys, when pressed locally, acted as if the meta key was being pressed on the remote machine. That is, the "s" key opens in the Ubuntu login menu (the power icon), and the "m" key opens the messaging menu. I found some info on using xmodmap to remap keys, however, I can't even begin to fathom what keys I could remap to solve this issue. Any ideas?

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• Intel D510MO board - 1000Mbit LAN or not?

  - by T.J. Crowder

  The Intel forum seems to be down (signing in fails with connection refused), but perhaps someone here knows the answer. The Intel D510MO product page says that the LAN is 10/100/1000, but when I look at the NM10 chipset it uses, it says it's just 10/100 (and the detailed PDF spec here backs that up pretty definitively). I don't immediately see anything saying the D510MO has a different LAN controller than the NM10's onboard one, and it would seem odd if it did given the purpose of the board (low power, small footprint; integrated). Does this board support 1000Mbit LAN or not? Anyone have direct knowledge of it? Thanks in advance.

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• Can I provision half a core as a virtual CPU?

  - by ramdaz

  I am virtualization newbie. Please advise on these questions. Please note using a commercial VM software like Citrix or VMware is not a choice for me. I have at my disposal a couple of 2x 4 core servers with 32 GB RAM. I need to create 16 VMs on each server to test some web applications. Can I provision half a core as a virtual CPU for each VM? To my best knowledge I can't do so on Xen. Is it possible on KVM or some other free open source VM solution? If it's not possible to assign half a core, how do I ensure that uniform processing power is available for all VMs? Since the job is to create separate instances for hosting 16 web apps in a physical server, do you recommend setting up a private cloud using Ubuntu Enterprise Cloud as a better option? Is there HA solution under KVM, like Remus for Xen?

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• Puppet's automatically generated certificates failing

  - by gparent

  I am running a default configuration of Puppet on Debian Squeeze 6.0.4. The server's FQDN is master.example.com. The client's FQDN is client.example.com. I am able to contact the puppet master and send a CSR. I sign it using puppetca -sa but the client will still not connect. Date of both machines is within 2 seconds of Tue Apr 3 20:59:00 UTC 2012 as I wrote this sentence. This is what appears in /var/log/syslog: Apr 3 17:03:52 localhost puppet-agent[18653]: Reopening log files Apr 3 17:03:52 localhost puppet-agent[18653]: Starting Puppet client version 2.6.2 Apr 3 17:03:53 localhost puppet-agent[18653]: Could not retrieve catalog from remote server: SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed Apr 3 17:03:53 localhost puppet-agent[18653]: Using cached catalog Apr 3 17:03:53 localhost puppet-agent[18653]: Could not retrieve catalog; skipping run Here is some interesting output: OpenSSL client test: client:~# openssl s_client -host master.example.com -port 8140 -cert /var/lib/puppet/ssl/certs/client.example.com.pem -key /var/lib/puppet/ssl/private_keys/client.example.com.pem -CAfile /var/lib/puppet/ssl/certs/ca.pem CONNECTED(00000003) depth=1 /CN=Puppet CA: master.example.com verify return:1 depth=0 /CN=master.example.com verify error:num=7:certificate signature failure verify return:1 depth=0 /CN=master.example.com verify return:1 18509:error:1409441B:SSL routines:SSL3_READ_BYTES:tlsv1 alert decrypt error:s3_pkt.c:1102:SSL alert number 51 18509:error:140790E5:SSL routines:SSL23_WRITE:ssl handshake failure:s23_lib.c:188: client:~# master's certificate: root@master:/etc/puppet# openssl x509 -text -noout -in /etc/puppet/ssl/certs/master.example.com.pem Certificate: Data: Version: 3 (0x2) Serial Number: 2 (0x2) Signature Algorithm: sha1WithRSAEncryption Issuer: CN=Puppet CA: master.example.com Validity Not Before: Apr 2 20:01:28 2012 GMT Not After : Apr 2 20:01:28 2017 GMT Subject: CN=master.example.com Subject Public Key Info: Public Key Algorithm: rsaEncryption RSA Public Key: (1024 bit) Modulus (1024 bit): 00:a9:c1:f9:4c:cd:0f:68:84:7b:f4:93:16:20:44: 7a:2b:05:8e:57:31:05:8e:9c:c8:08:68:73:71:39: c1:86:6a:59:93:6e:53:aa:43:11:83:5b:2d:8c:7d: 54:05:65:c1:e1:0e:94:4a:f0:86:58:c3:3d:4f:f3: 7d:bd:8e:29:58:a6:36:f4:3e:b2:61:ec:53:b5:38: 8e:84:ac:5f:a3:e3:8c:39:bd:cf:4f:3c:ff:a9:65: 09:66:3c:ba:10:14:69:d5:07:57:06:28:02:37:be: 03:82:fb:90:8b:7d:b3:a5:33:7b:9b:3a:42:51:12: b3:ac:dd:d5:58:69:a9:8a:ed Exponent: 65537 (0x10001) X509v3 extensions: X509v3 Basic Constraints: critical CA:FALSE Netscape Comment: Puppet Ruby/OpenSSL Internal Certificate X509v3 Key Usage: critical Digital Signature, Key Encipherment X509v3 Subject Key Identifier: 8C:2F:14:84:B6:A1:B5:0C:11:52:36:AB:E5:3F:F2:B9:B3:25:F3:1C X509v3 Extended Key Usage: critical TLS Web Server Authentication, TLS Web Client Authentication Signature Algorithm: sha1WithRSAEncryption 7b:2c:4f:c2:76:38:ab:03:7f:c6:54:d9:78:1d:ab:6c:45:ab: 47:02:c7:fd:45:4e:ab:b5:b6:d9:a7:df:44:72:55:0c:a5:d0: 86:58:14:ae:5f:6f:ea:87:4d:78:e4:39:4d:20:7e:3d:6d:e9: e2:5e:d7:c9:3c:27:43:a4:29:44:85:a1:63:df:2f:55:a9:6a: 72:46:d8:fb:c7:cc:ca:43:e7:e1:2c:fe:55:2a:0d:17:76:d4: e5:49:8b:85:9f:fa:0e:f6:cc:e8:28:3e:8b:47:b0:e1:02:f0: 3d:73:3e:99:65:3b:91:32:c5:ce:e4:86:21:b2:e0:b4:15:b5: 22:63 root@master:/etc/puppet# CA's certificate: root@master:/etc/puppet# openssl x509 -text -noout -in /etc/puppet/ssl/certs/ca.pem Certificate: Data: Version: 3 (0x2) Serial Number: 1 (0x1) Signature Algorithm: sha1WithRSAEncryption Issuer: CN=Puppet CA: master.example.com Validity Not Before: Apr 2 20:01:05 2012 GMT Not After : Apr 2 20:01:05 2017 GMT Subject: CN=Puppet CA: master.example.com Subject Public Key Info: Public Key Algorithm: rsaEncryption RSA Public Key: (1024 bit) Modulus (1024 bit): 00:b5:2c:3e:26:a3:ae:43:b8:ed:1e:ef:4d:a1:1e: 82:77:78:c2:98:3f:e2:e0:05:57:f0:8d:80:09:36: 62:be:6c:1a:21:43:59:1d:e9:b9:4d:e0:9c:fa:09: aa:12:a1:82:58:fc:47:31:ed:ad:ad:73:01:26:97: ef:d2:d6:41:6b:85:3b:af:70:00:b9:63:e9:1b:c3: ce:57:6d:95:0e:a6:d2:64:bd:1f:2c:1f:5c:26:8e: 02:fd:d3:28:9e:e9:8f:bc:46:bb:dd:25:db:39:57: 81:ed:e5:c8:1f:3d:ca:39:cf:e7:f3:63:75:f6:15: 1f:d4:71:56:ed:84:50:fb:5d Exponent: 65537 (0x10001) X509v3 extensions: X509v3 Basic Constraints: critical CA:TRUE Netscape Comment: Puppet Ruby/OpenSSL Internal Certificate X509v3 Key Usage: critical Certificate Sign, CRL Sign X509v3 Subject Key Identifier: 8C:2F:14:84:B6:A1:B5:0C:11:52:36:AB:E5:3F:F2:B9:B3:25:F3:1C Signature Algorithm: sha1WithRSAEncryption 1d:cd:c6:65:32:42:a5:01:62:46:87:10:da:74:7e:8b:c8:c9: 86:32:9e:c2:2e:c1:fd:00:79:f0:ef:d8:73:dd:7e:1b:1a:3f: cc:64:da:a3:38:ad:49:4e:c8:4d:e3:09:ba:bc:66:f2:6f:63: 9a:48:19:2d:27:5b:1d:2a:69:bf:4f:f4:e0:67:5e:66:84:30: e5:85:f4:49:6e:d0:92:ae:66:77:50:cf:45:c0:29:b2:64:87: 12:09:d3:10:4d:91:b6:f3:63:c4:26:b3:fa:94:2b:96:18:1f: 9b:a9:53:74:de:9c:73:a4:3a:8d:bf:fa:9c:c0:42:9d:78:49: 4d:70 root@master:/etc/puppet# Client's certificate: client:~# openssl x509 -text -noout -in /var/lib/puppet/ssl/certs/client.example.com.pem Certificate: Data: Version: 3 (0x2) Serial Number: 3 (0x3) Signature Algorithm: sha1WithRSAEncryption Issuer: CN=Puppet CA: master.example.com Validity Not Before: Apr 2 20:01:36 2012 GMT Not After : Apr 2 20:01:36 2017 GMT Subject: CN=client.example.com Subject Public Key Info: Public Key Algorithm: rsaEncryption RSA Public Key: (1024 bit) Modulus (1024 bit): 00:ae:88:6d:9b:e3:b1:fc:47:07:d6:bf:ea:53:d1: 14:14:9b:35:e6:70:43:e0:58:35:76:ac:c5:9d:86: 02:fd:77:28:fc:93:34:65:9d:dd:0b:ea:21:14:4d: 8a:95:2e:28:c9:a5:8d:a2:2c:0e:1c:a0:4c:fa:03: e5:aa:d3:97:98:05:59:3c:82:a9:7c:0e:e9:df:fd: 48:81:dc:33:dc:88:e9:09:e4:19:d6:e4:7b:92:33: 31:73:e4:f2:9c:42:75:b2:e1:9f:d9:49:8c:a7:eb: fa:7d:cb:62:22:90:1c:37:3a:40:95:a7:a0:3b:ad: 8e:12:7c:6e:ad:04:94:ed:47 Exponent: 65537 (0x10001) X509v3 extensions: X509v3 Basic Constraints: critical CA:FALSE Netscape Comment: Puppet Ruby/OpenSSL Internal Certificate X509v3 Key Usage: critical Digital Signature, Key Encipherment X509v3 Subject Key Identifier: 8C:2F:14:84:B6:A1:B5:0C:11:52:36:AB:E5:3F:F2:B9:B3:25:F3:1C X509v3 Extended Key Usage: critical TLS Web Server Authentication, TLS Web Client Authentication Signature Algorithm: sha1WithRSAEncryption 33:1f:ec:3c:91:5a:eb:c6:03:5f:a1:58:60:c3:41:ed:1f:fe: cb:b2:40:11:63:4d:ba:18:8a:8b:62:ba:ab:61:f5:a0:6c:0e: 8a:20:56:7b:10:a1:f9:1d:51:49:af:70:3a:05:f9:27:4a:25: d4:e6:88:26:f7:26:e0:20:30:2a:20:1d:c4:d3:26:f1:99:cf: 47:2e:73:90:bd:9c:88:bf:67:9e:dd:7c:0e:3a:86:6b:0b:8d: 39:0f:db:66:c0:b6:20:c3:34:84:0e:d8:3b:fc:1c:a8:6c:6c: b1:19:76:65:e6:22:3c:bf:ff:1c:74:bb:62:a0:46:02:95:fa: 83:41 client:~#

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• Container Options in AWS Elastic Beanstalk

  - by Sangram Anand

  We have deployed a java webapplication in Elastic Beanstalk with the minimum instance count 1 and max instance count 2 for Autoscaling. The custom AMI we are using is c1.medium with Sun JDK 6. The environment status changed to yellow and then red. After checking into the log file from the snapshot logs we found a exception - Caused by: java.lang.OutOfMemoryError: Java heap space. Assuming this could be one of the possible reason for the Environment failure. The settings that we have configured in the Environment Container option are Initial JVM Heap Size (MB) - 256M Maximum JVM Heap Size (MB) - 512m The maximum heap size the java virtual machine will ever consume, specified on the JVM launch command line using -Xmx. Maximum JVM Permanent Generation Size (MB) - 512m Should i increase the Heap size from 512m to more or is it fine.

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• What does the EC2 command line say when a machine won't start?

  - by OneSolitaryNoob

  When starting an instance on Amazon EC2, how would I detect a failure, for instance, if there's no machine available to fulfill my request? I'm using one of the less-common machine types and am concerned it won't start up, but am having trouble finding out what message to look for to detect this. I'm using the EC2 commandline tools to do this. I know I can look for 'running' when I do ec2-describe-instance to see if the machine is up, but don't know what to look for to see if the startup failed. Thanks!

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• Confirm disk is broken when it passes all diagnostics

  - by Halfgaar

  I have a system with a potentially broken disk, but the disk passes all manner of diagnostics. I have been unable to confirm that the disk is broken. What are my options? I could just replace the disk, but because this situation is very similar to another more severe situation I have (long story), I'd like to actually make a proper diagnosis as opposed to randomly binning hardware. The issue and history is this: I had a Debian Linux PC (500 MHz P3) acting as router, nagios and munin. It crashed every couple of weeks. No logs or dmesg could be obtained (because it's an old Compaq that only boots when you configure it as keyboardless, making connecting a keyboard later, once it's booted, impossible). At the time, I just replaced the computer with another Compaq (P4 2.4 GHz) because I thought the hardware was faulty. However, it still crashed every couple of weeks. the difference is that on this computer, I can still SSH into it. It gives all kinds of errors on hda. I'd like to confirm that the disk is broken, but nothing I do confirms this: SMART error logs shows no errors. Normally when a disk starts acting up, SMART my pass, but it still records a read-error in the error log. SMART self-test (smartctl -t long /dev/sda) completes without errors. re-allocated sector count (a tell-tale parameter) has been 31 all its life, even when the disk was still in use in my desktop PC years ago, and it still is. The figure never changed. dd if=/dev/sda of=/dev/null bs=4096 passes with flying colors. What else can I do to assess the health of the drive? Again, this is not about making this router fully functional again, this is a disk forensic question, because it just so happens that I have another server that potentially has the same problem, and knowing the answer to this will possibly help me greatly. For the record, below are logs and such. This is the smartctl -a output: smartctl 5.40 2010-07-12 r3124 [i686-pc-linux-gnu] (local build) Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net === START OF INFORMATION SECTION === Model Family: Seagate Barracuda 7200.7 and 7200.7 Plus family Device Model: ST3120026A Serial Number: 5JT1CLQM Firmware Version: 3.06 User Capacity: 120,034,123,776 bytes Device is: In smartctl database [for details use: -P show] ATA Version is: 6 ATA Standard is: ATA/ATAPI-6 T13 1410D revision 2 Local Time is: Mon Jul 1 21:18:33 2013 CEST SMART support is: Available - device has SMART capability. SMART support is: Enabled === START OF READ SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED General SMART Values: Offline data collection status: (0x82) Offline data collection activity was completed without error. Auto Offline Data Collection: Enabled. Self-test execution status: ( 24) The self-test routine was aborted by the host. Total time to complete Offline data collection: ( 430) seconds. Offline data collection capabilities: (0x5b) SMART execute Offline immediate. Auto Offline data collection on/off support. Suspend Offline collection upon new command. Offline surface scan supported. Self-test supported. No Conveyance Self-test supported. Selective Self-test supported. SMART capabilities: (0x0003) Saves SMART data before entering power-saving mode. Supports SMART auto save timer. Error logging capability: (0x01) Error logging supported. No General Purpose Logging support. Short self-test routine recommended polling time: ( 1) minutes. Extended self-test routine recommended polling time: ( 85) minutes. SMART Attributes Data Structure revision number: 10 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x000f 050 046 006 Pre-fail Always - 47766662 3 Spin_Up_Time 0x0003 097 096 000 Pre-fail Always - 0 4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 10 5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 31 7 Seek_Error_Rate 0x000f 084 060 030 Pre-fail Always - 820305 9 Power_On_Hours 0x0032 048 048 000 Old_age Always - 46373 10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0 12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 605 194 Temperature_Celsius 0x0022 036 065 000 Old_age Always - 36 195 Hardware_ECC_Recovered 0x001a 050 046 000 Old_age Always - 47766662 197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x003e 200 196 000 Old_age Always - 6 200 Multi_Zone_Error_Rate 0x0000 100 253 000 Old_age Offline - 0 202 Data_Address_Mark_Errs 0x0032 100 253 000 Old_age Always - 0 SMART Error Log Version: 1 No Errors Logged SMART Self-test log structure revision number 1 Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error # 1 Extended offline Aborted by host 80% 46361 - # 2 Extended offline Completed without error 00% 46358 - # 3 Short offline Completed without error 00% 12046 - # 4 Extended offline Completed without error 00% 10472 - # 5 Short offline Completed without error 00% 10471 - # 6 Short offline Completed without error 00% 10471 - # 7 Short offline Completed without error 00% 6770 - # 8 Extended offline Aborted by host 90% 5958 - # 9 Extended offline Aborted by host 90% 5951 - #10 Short offline Completed without error 00% 5024 - #11 Extended offline Aborted by host 80% 5024 - #12 Short offline Completed without error 00% 3697 - #13 Short offline Completed without error 00% 237 - #14 Short offline Completed without error 00% 145 - #15 Short offline Completed without error 00% 69 - #16 Extended offline Completed without error 00% 68 - #17 Short offline Completed without error 00% 66 - #18 Short offline Completed without error 00% 49 - #19 Short offline Completed without error 00% 29 - #20 Short offline Completed without error 00% 29 - SMART Selective self-test log data structure revision number 1 SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS 1 0 0 Not_testing 2 0 0 Not_testing 3 0 0 Not_testing 4 0 0 Not_testing 5 0 0 Not_testing Selective self-test flags (0x0): After scanning selected spans, do NOT read-scan remainder of disk. If Selective self-test is pending on power-up, resume after 0 minute delay. And this is the dmesg error when it has crashed (which repeats for a bunch of different sectors): [1755091.211136] sd 0:0:0:0: [sda] Unhandled error code [1755091.211144] sd 0:0:0:0: [sda] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK [1755091.211151] sd 0:0:0:0: [sda] CDB: Read(10): 28 00 08 fe ad 38 00 00 08 00 [1755091.211166] end_request: I/O error, dev sda, sector 150908216

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• error when installing mysql ruby gem on OSX 10.6.3

  - by kapil.israni

  So I am getting the same issue as mentioned here - http://stackoverflow.com/questions/1366746/gem-install-mysql-failure-in-snow-leopard But I haven't been able to get it fixed using the answers on this link. Here's a brief history - I had MAMP on my machine, but now I downloaded the latest MySQL from mysql.com and installed version 5.1.46 this new version runs fine and client "mysql" is able to connect and I also have XCode v3.2.1, since someone mentioned that it can cause issues. Here's the error - **Building native extensions. This could take a while... ERROR: Error installing mysql: ERROR: Failed to build gem native extension. /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb --with-mysql-config=/usr/local/mysql/bin/mysql_config mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/ruby.h Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/mysql-2.8.1 for inspection. Results logged to /Library/Ruby/Gems/1.8/gems/mysql-2.8.1/ext/mysql_api/gem_make.out**

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• Remote Desktop or Streaming Software/Services that Supports Gaming

  - by Griffin

  I've simply been amazed by the quality and speed of Onlive, as this technology has the potential of making hardware requirements irrelevant to the average user. However, at the moment Onlive is only for remotely controlling video games, and not desktops or other devices in general. I'm in pursuit of software or services that can accomplish this as well as Onlive does. I need: viewer (client) program portability (able to run on a USB stick) DirectX, OpenGL / full-screen game compatibility on the server side.** Gaming-acceptable color/scaling quality and responsiveness. I have a very powerful desktop at home and I want to be able to access this raw power from any other computer that I stick my USB into (in the same way Onlive gives gamers use of their powerful servers) What software/services has most of the above? NOTE: please specify what features your suggestion doesn't have.

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• Linux: Why to change inode size?

  - by FractalizeR

  Hello. Tune2fs allows to change inode size from default 128 bytes to almost anything (but it should be power of two). What can the the reasons of changing default inode size? Here http://kbase.redhat.com/faq/docs/DOC-7433 is written, that this can be done to be able to store ACL attributes inside inodes. What else can be stored inside inode? May be some other attributes? Or anything else? Is there any reason to increase inode size on modern high-capacity drives (2TB and more)?

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• Is the valid state domain of a program a regular language?

  - by BCS

  If you look at the call stack of a program and treat each return pointer as a token, what kind of automata is needed to build a recognizer for the valid states of the program? As a corollary, what kind of automata is needed to build a recognizer for a specific bug state? My thought is that if these form regular languages than some interesting tools could be built around that. E.g. given a set of crash/failure dumps, automatically group them and generate a recognizer to identify new instances of know bugs.

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• Is it possible to have a computer run two OS's in memory at the same time?

  - by Hebon

  I'm sick of needing to reboot my computer every time I wish to use another OS, or run a virtual machine that skimps on power. With the onset of large amounts of memory for computers nowadays I began to think that there must be some way to run two OS's in memory with a way to switch between the two. In my mind, it doesn't seem too difficult; a compatibility layer boots up after bios, which in turn boots to OS1. While in OS1, software is run that triggers a save to ram boots back to the compatability layer, and then boots to OS2. This way, the OS's can be used side by side and boot times are cut drastically short since both OSs are already in ram. Both OS's have their own designated and protected memory so there is no problem there... I mean, it seems fine, but no one has done it, so there must be some reason as to why. I would love some insight into this please.

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• Very poor battery life on Lenovo ThinkPad W500 laptop

  - by Matt

  I have a new ThinkPad W500 laptop (w/ 9 cell battery) running Windows 7 RTM 64-bit. All drivers* and BIOS are the latest. Battery life appeared poor so I performed several tests under the following conditions: Battery starts with 100% charge Screen on minimum brightness Screen saver running Wifi n enabled and active "Normal" set of programs running including Outlook 2007, FeedDemon, TweetDeck and antivirus Laptop left untouched during tests Under the above conditions, I clocked under 2 hours of battery life across 3 tests (1:49, 1:52, 1:47). If I actually use the computer, we're looking at 1:30. Something is not right... The smoking gun here is that Lenovo hasn't officially released Windows 7 drivers for this laptop. I haven't tried with Vista or XP yet. What are others seeing? Update: For W500 owners w/ the 9 cell battery, what value do you see for "Full charge capacity" when on the Battery tab of the Power Manager utility? I see 81.87 Wh.

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• iPhone SDK Push Notification

  - by Craig

  I have setup push notifications in the apple developer panel and added the code to my application. It works fine on the phone using a development profile but if I use a distribution (ad-hoc) profile so that I can give it to a few users for testing it gives an error and crashes, the log gives the following error Code: Thu Jun 25 22:22:35 unknown SpringBoard[729] <Warning>: *** Assertion failure in -[SBRemoteNotificationServer registerApplication:forEnvironment:withTypes:], /SourceCache/SpringBoard/SpringBoard-919.5/SBRemoteNotificationServer.m:633 Thu Jun 25 22:22:35 unknown SpringBoard[729] <Error>: *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'no connection found for environment production' I am using the following code in the app Code: [[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound)]; The thing I don't understand is why it works perfectly using a development profile but with ad-hoc it crashes. Does anyone know what would cause this?, I've tried changing lots of things to try and find the issue but have found nothing.

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• Open Source webapp that shows PC / Projector status in 30+ Lecture rooms

  - by Seanchán

  I am looking for a simple web application that only has a simple graphical representation of the current status of 30+ lecture rooms. I.e. Green = good, Red=bad i.e. PC or Projector not working. With a little message and a ETA as well. I am not looking for monitoring software, merely a way for a tech to flag a room as "technically challenged" until 1PM or until "Friday 10AM". With a message for those lecturers who are interested: "Waiting on replacement bulb" or "Power supply gone" I know this is a simple thing to code up yourself, but I am looking for something that has been around for a few years that has some cool extra little functionality that you wouldn't think of yourself. I just can't find anything like that out there. And just to be clear: not monitoring software, more like lecturer feedback web app.

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• dell E6500 laptop will not hibernate/standby

  - by Mark Schultheiss

  I am using a Dell E6500 laptop with windows XP on it, it was originally tagged/installed with Windows Vista. My issue is, when I close the lid, it will not either Hibernate or Standby. If I close the lid with either of these options, I then have to startup from scratch, and anything I had open is not open. I just want to close the lid, have it keep what I have running, not use power util I open the lid again and start it up (with the stuff still open I had open of course). Suggestions?

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• Running JIRA on a VM

  - by Peter Kahn

  Anyone have any success or failure running Jira on a VM? I am setting up a new source control and defect tracking server. My server room is near full and my services group suggested a VM. I saw that a bunch of people are running SVN on VM (including NCSA). The VM would also free me from hardware problems and give me high availability. Finally, it frees me from some red tape and it can be implemented faster. So, does anyone know of any reason why I shouldn't put Jira on a VM? Thanks

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• Increase application performance on Amazon AWS

  - by Honus Wagner

  I've got a client with an MVC v1 (.NET) application running on a micro instance. On this instance, I've got .NET, IIS 7.5, and MS SQL Server 2008 running to handle the application. The client has reported that it is taking nearly 10 seconds to process each request. Even loading the initial login page takes about that long, then logging in takes that long, etc etc. The currently running instance specs are as follows: 615 MB RAM Intel Xenon CPU E5430 @ 2.66GHz 2.78 GHz 64-Bit Is the memory availability the issue? or is it the processing power? I forsee two options: Change to a larget instance Set up a 2-tier architecture with two micro instances Which of these will give the application better performance? Thanks in advance.

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• Suse 12.3 cannot boot after a forced shutdown

  - by David Dai

  I was doing a system update using zypper update After a while the screen was filled with this message failed to start system logging service. and the system was not responding. I had to shutdown it by holding the power button. then I started the machine again, and selected to boot suse. Then I saw the fancy boot animation(some shiny big dots gathering to the center of the screen), then the screen just turned black and the monitor sayed "no signal". then I tried to boot into suse failsafe mode, which was fine. how can I investigate into this problem?

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• Problem sending mail with simple .net application. Server refusal error.

  - by Fatih

  I have a very simple .net application for testing SMTP on .net. But i am receiving this weird error. "System.Net.Mail.SmtpException: Failure sending mail. --- System.Net.WebException: Unable to connect to the remote server --- System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it" SMTP server is remote and doesn't need any kind of authentication so i don't need credentials. But i can send mails from this computer with outlook using same smtp server and same smtp settings without any problem. Any ideas? It will be appreciated so much. Imports System.Net.Mail Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim smtp As New SmtpClient smtp.Host = "10.241.128.220" smtp.Port = 25 smtp.Send("[email protected]", "[email protected]", "test", "test") End Sub

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• <100% Test coverage - best practices in selecting test areas

  - by Paul Nathan

  Suppose you're working on a project and the time/money budget does not allow 100% coverage of all code/paths. It then follows that some critical subset of your code needs to be tested. Clearly a 'gut-check' approach can be used to test the system, where intuition and manual analysis can produce some sort of test coverage that will be 'ok'. However, I'm presuming that there are best practices/approaches/processes that identify critical elements up to some threshold and let you focus your test elements on those blocks. For example, one popular process for identifying failures in manufacturing is Failure Mode and Effects Analysis. I'm looking for a process(es) to identify critical testing blocks in software.

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• How to organize a large number of objects

  - by shane

  We have a large number of documents and metadata (xml files) associated with these documents. What is the best way to organize them? Currently we put them into a series of nested folders: /repository/category/date(when they were loaded into our db)/document_number.pdf and .xml We use the path as a unique identifier for the document in our system. This is more versatile than putting them all in a single flat folder. also it is independent from our database/application, so we can reload them in case of failure. Yet, it introduces some limitations. for example we can't move the files once they've been placed in this structure, also it takes work to put them this way. What is the best practice? How websites such as Scribd deal with this problem?

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• ASUS P6X58D and 12 GB of RAM

  - by Hunter

  I just assembled my new PC and it screams, BUT it's only recognizing 8 GB of RAM in BIOS and OS rather than the installed 12 GB. In the BIOS the RAM was registering at 1066 MHz so I set it to 1600 MHz. I updated the BIOS to the latest non-beta release. http://www.asus.com/product.aspx?P_ID=wurRaDZ8lo4Ckukj OS: Windows 7 Ultimate 64-bit Motherboard: ASUS P6X58D Premium CPU: Intel Core i7 920 RAM: CORSAIR XMS3 12 GB (6 x 2 GB) 240-Pin DDR3 SDRAM DDR3 1600 HDD: Intel 80 GB SSD SATA II Power supply: Kingwin 1000 W Modular I've installed the Beta BIOS 0808 but no luck!

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