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• Outlook locking network connection/session?

  - by HaydnWVN

  Scenario: We have an 'automatic orders' machine sat in the corner running XP with Outlook 2003. Its job is to check for new emails on a specific account, when it encounters one it checks the e-mail body for specific wording to determine which customer it is from (using a macro), then it checks the attachment for specific order codes before parsing the attachment to create a .csv file (which is then e-mailed onto one of the sales team) before importing the .csv into our bespoke ERP/Sales Order system to create an order. Problem: Periodically the machine will have symptoms of a lost network connection (unable to connect to any network source). Sometimes after several days, sometimes over a week. Volume of emails/orders processed does not seem to be linked. Additional info: The machines .pst is stored on a mapped network location. The .csv created is stored on a mapped network location. This is a workgroup, not a domain. All network drives are Samba shares from an Ubuntu fileserver. Our bespoke system runs from a database (MySQL) Ubuntu server. Our troubleshooting so far: I have switched machines (previous was Win2000) with the same symptoms. Restarting the machine FIXES the problem. Closing Outlook and then end tasking an Outlook.exe background process FIXES the problem. If you close Outlook, without end taking the background process, outlook will not reopen (saying it cannot find the pst file & it will not open any network location). Does Outlook have some kind of 'max session' linking it to network activity that is not closing after a mail request? Could Auto-archive be causing this? Is there a tool to check/display what each outlook.exe process is doing? Have not found many ways to troubleshoot this yet, as it is so infrequent...

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• Cannot open root device xvda1 or unknown-block(0,0)

  - by svoop

  I'm putting together a Dom0 and three DomU (all Gentoo) with kernel 3.5.7 and Xen 4.1.1. Each Dom has it's own md (md0 for Dom0, md1 for Dom1 etc). Dom0 works fine so far, however, I'm stuck trying to create DomUs. It appears the xvda1 device on DomU is not created or accessible: Parsing config file dom1 domainbuilder: detail: xc_dom_allocate: cmdline="root=/dev/xvda1 console=hvc0 root=/dev/xvda1 ro 3", features="(null)" domainbuilder: detail: xc_dom_kernel_mem: called domainbuilder: detail: xc_dom_boot_xen_init: ver 4.1, caps xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64 domainbuilder: detail: xc_dom_parse_image: called domainbuilder: detail: xc_dom_find_loader: trying multiboot-binary loader ... domainbuilder: detail: loader probe failed domainbuilder: detail: xc_dom_find_loader: trying Linux bzImage loader ... domainbuilder: detail: xc_dom_malloc : 10530 kB domainbuilder: detail: xc_dom_do_gunzip: unzip ok, 0x2f7a4f -> 0xa48888 domainbuilder: detail: loader probe OK xc: detail: elf_parse_binary: phdr: paddr=0x1000000 memsz=0x558000 xc: detail: elf_parse_binary: phdr: paddr=0x1558000 memsz=0x690e8 xc: detail: elf_parse_binary: phdr: paddr=0x15c2000 memsz=0x127c0 xc: detail: elf_parse_binary: phdr: paddr=0x15d5000 memsz=0x533000 xc: detail: elf_parse_binary: memory: 0x1000000 -> 0x1b08000 xc: detail: elf_xen_parse_note: GUEST_OS = "linux" xc: detail: elf_xen_parse_note: GUEST_VERSION = "2.6" xc: detail: elf_xen_parse_note: XEN_VERSION = "xen-3.0" xc: detail: elf_xen_parse_note: VIRT_BASE = 0xffffffff80000000 xc: detail: elf_xen_parse_note: ENTRY = 0xffffffff815d5210 xc: detail: elf_xen_parse_note: HYPERCALL_PAGE = 0xffffffff81001000 xc: detail: elf_xen_parse_note: FEATURES = "!writable_page_tables|pae_pgdir_above_4gb" xc: detail: elf_xen_parse_note: PAE_MODE = "yes" xc: detail: elf_xen_parse_note: LOADER = "generic" xc: detail: elf_xen_parse_note: unknown xen elf note (0xd) xc: detail: elf_xen_parse_note: SUSPEND_CANCEL = 0x1 xc: detail: elf_xen_parse_note: HV_START_LOW = 0xffff800000000000 xc: detail: elf_xen_parse_note: PADDR_OFFSET = 0x0 xc: detail: elf_xen_addr_calc_check: addresses: xc: detail: virt_base = 0xffffffff80000000 xc: detail: elf_paddr_offset = 0x0 xc: detail: virt_offset = 0xffffffff80000000 xc: detail: virt_kstart = 0xffffffff81000000 xc: detail: virt_kend = 0xffffffff81b08000 xc: detail: virt_entry = 0xffffffff815d5210 xc: detail: p2m_base = 0xffffffffffffffff domainbuilder: detail: xc_dom_parse_elf_kernel: xen-3.0-x86_64: 0xffffffff81000000 -> 0xffffffff81b08000 domainbuilder: detail: xc_dom_mem_init: mem 5000 MB, pages 0x138800 pages, 4k each domainbuilder: detail: xc_dom_mem_init: 0x138800 pages domainbuilder: detail: xc_dom_boot_mem_init: called domainbuilder: detail: x86_compat: guest xen-3.0-x86_64, address size 64 domainbuilder: detail: xc_dom_malloc : 10000 kB domainbuilder: detail: xc_dom_build_image: called domainbuilder: detail: xc_dom_alloc_segment: kernel : 0xffffffff81000000 -> 0xffffffff81b08000 (pfn 0x1000 + 0xb08 pages) domainbuilder: detail: xc_dom_pfn_to_ptr: domU mapping: pfn 0x1000+0xb08 at 0x7fdec9b85000 xc: detail: elf_load_binary: phdr 0 at 0x0x7fdec9b85000 -> 0x0x7fdeca0dd000 xc: detail: elf_load_binary: phdr 1 at 0x0x7fdeca0dd000 -> 0x0x7fdeca1460e8 xc: detail: elf_load_binary: phdr 2 at 0x0x7fdeca147000 -> 0x0x7fdeca1597c0 xc: detail: elf_load_binary: phdr 3 at 0x0x7fdeca15a000 -> 0x0x7fdeca1cd000 domainbuilder: detail: xc_dom_alloc_segment: phys2mach : 0xffffffff81b08000 -> 0xffffffff824cc000 (pfn 0x1b08 + 0x9c4 pages) domainbuilder: detail: xc_dom_pfn_to_ptr: domU mapping: pfn 0x1b08+0x9c4 at 0x7fdec91c1000 domainbuilder: detail: xc_dom_alloc_page : start info : 0xffffffff824cc000 (pfn 0x24cc) domainbuilder: detail: xc_dom_alloc_page : xenstore : 0xffffffff824cd000 (pfn 0x24cd) domainbuilder: detail: xc_dom_alloc_page : console : 0xffffffff824ce000 (pfn 0x24ce) domainbuilder: detail: nr_page_tables: 0x0000ffffffffffff/48: 0xffff000000000000 -> 0xffffffffffffffff, 1 table(s) domainbuilder: detail: nr_page_tables: 0x0000007fffffffff/39: 0xffffff8000000000 -> 0xffffffffffffffff, 1 table(s) domainbuilder: detail: nr_page_tables: 0x000000003fffffff/30: 0xffffffff80000000 -> 0xffffffffbfffffff, 1 table(s) domainbuilder: detail: nr_page_tables: 0x00000000001fffff/21: 0xffffffff80000000 -> 0xffffffff827fffff, 20 table(s) domainbuilder: detail: xc_dom_alloc_segment: page tables : 0xffffffff824cf000 -> 0xffffffff824e6000 (pfn 0x24cf + 0x17 pages) domainbuilder: detail: xc_dom_pfn_to_ptr: domU mapping: pfn 0x24cf+0x17 at 0x7fdece676000 domainbuilder: detail: xc_dom_alloc_page : boot stack : 0xffffffff824e6000 (pfn 0x24e6) domainbuilder: detail: xc_dom_build_image : virt_alloc_end : 0xffffffff824e7000 domainbuilder: detail: xc_dom_build_image : virt_pgtab_end : 0xffffffff82800000 domainbuilder: detail: xc_dom_boot_image: called domainbuilder: detail: arch_setup_bootearly: doing nothing domainbuilder: detail: xc_dom_compat_check: supported guest type: xen-3.0-x86_64 <= matches domainbuilder: detail: xc_dom_compat_check: supported guest type: xen-3.0-x86_32p domainbuilder: detail: xc_dom_compat_check: supported guest type: hvm-3.0-x86_32 domainbuilder: detail: xc_dom_compat_check: supported guest type: hvm-3.0-x86_32p domainbuilder: detail: xc_dom_compat_check: supported guest type: hvm-3.0-x86_64 domainbuilder: detail: xc_dom_update_guest_p2m: dst 64bit, pages 0x138800 domainbuilder: detail: clear_page: pfn 0x24ce, mfn 0x37ddee domainbuilder: detail: clear_page: pfn 0x24cd, mfn 0x37ddef domainbuilder: detail: xc_dom_pfn_to_ptr: domU mapping: pfn 0x24cc+0x1 at 0x7fdece675000 domainbuilder: detail: start_info_x86_64: called domainbuilder: detail: setup_hypercall_page: vaddr=0xffffffff81001000 pfn=0x1001 domainbuilder: detail: domain builder memory footprint domainbuilder: detail: allocated domainbuilder: detail: malloc : 20658 kB domainbuilder: detail: anon mmap : 0 bytes domainbuilder: detail: mapped domainbuilder: detail: file mmap : 0 bytes domainbuilder: detail: domU mmap : 21392 kB domainbuilder: detail: arch_setup_bootlate: shared_info: pfn 0x0, mfn 0xbaa6f domainbuilder: detail: shared_info_x86_64: called domainbuilder: detail: vcpu_x86_64: called domainbuilder: detail: vcpu_x86_64: cr3: pfn 0x24cf mfn 0x37dded domainbuilder: detail: launch_vm: called, ctxt=0x7fff224e4ea0 domainbuilder: detail: xc_dom_release: called Daemon running with PID 4639 [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Linux version 3.5.7-gentoo (root@majordomo) (gcc version 4.5.4 (Gentoo 4.5.4 p1.0, pie-0.4.7) ) #1 SMP Tue Nov 20 10:49:51 CET 2012 [ 0.000000] Command line: root=/dev/xvda1 console=hvc0 root=/dev/xvda1 ro 3 [ 0.000000] ACPI in unprivileged domain disabled [ 0.000000] e820: BIOS-provided physical RAM map: [ 0.000000] Xen: [mem 0x0000000000000000-0x000000000009ffff] usable [ 0.000000] Xen: [mem 0x00000000000a0000-0x00000000000fffff] reserved [ 0.000000] Xen: [mem 0x0000000000100000-0x0000000138ffffff] usable [ 0.000000] NX (Execute Disable) protection: active [ 0.000000] MPS support code is not built-in. [ 0.000000] Using acpi=off or acpi=noirq or pci=noacpi may have problem [ 0.000000] DMI not present or invalid. [ 0.000000] No AGP bridge found [ 0.000000] e820: last_pfn = 0x139000 max_arch_pfn = 0x400000000 [ 0.000000] e820: last_pfn = 0x100000 max_arch_pfn = 0x400000000 [ 0.000000] init_memory_mapping: [mem 0x00000000-0xffffffff] [ 0.000000] init_memory_mapping: [mem 0x100000000-0x138ffffff] [ 0.000000] NUMA turned off [ 0.000000] Faking a node at [mem 0x0000000000000000-0x0000000138ffffff] [ 0.000000] Initmem setup node 0 [mem 0x00000000-0x138ffffff] [ 0.000000] NODE_DATA [mem 0x1387fc000-0x1387fffff] [ 0.000000] Zone ranges: [ 0.000000] DMA [mem 0x00010000-0x00ffffff] [ 0.000000] DMA32 [mem 0x01000000-0xffffffff] [ 0.000000] Normal [mem 0x100000000-0x138ffffff] [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x00010000-0x0009ffff] [ 0.000000] node 0: [mem 0x00100000-0x138ffffff] [ 0.000000] SMP: Allowing 1 CPUs, 0 hotplug CPUs [ 0.000000] No local APIC present [ 0.000000] APIC: disable apic facility [ 0.000000] APIC: switched to apic NOOP [ 0.000000] e820: cannot find a gap in the 32bit address range [ 0.000000] e820: PCI devices with unassigned 32bit BARs may break! [ 0.000000] e820: [mem 0x139100000-0x1394fffff] available for PCI devices [ 0.000000] Booting paravirtualized kernel on Xen [ 0.000000] Xen version: 4.1.1 (preserve-AD) [ 0.000000] setup_percpu: NR_CPUS:64 nr_cpumask_bits:64 nr_cpu_ids:1 nr_node_ids:1 [ 0.000000] PERCPU: Embedded 26 pages/cpu @ffff880138400000 s75712 r8192 d22592 u2097152 [ 0.000000] Built 1 zonelists in Node order, mobility grouping on. Total pages: 1259871 [ 0.000000] Policy zone: Normal [ 0.000000] Kernel command line: root=/dev/xvda1 console=hvc0 root=/dev/xvda1 ro 3 [ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes) [ 0.000000] __ex_table already sorted, skipping sort [ 0.000000] Checking aperture... [ 0.000000] No AGP bridge found [ 0.000000] Memory: 4943980k/5128192k available (3937k kernel code, 448k absent, 183764k reserved, 1951k data, 524k init) [ 0.000000] SLUB: Genslabs=15, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 [ 0.000000] Hierarchical RCU implementation. [ 0.000000] NR_IRQS:4352 nr_irqs:256 16 [ 0.000000] Console: colour dummy device 80x25 [ 0.000000] console [tty0] enabled [ 0.000000] console [hvc0] enabled [ 0.000000] installing Xen timer for CPU 0 [ 0.000000] Detected 3411.602 MHz processor. [ 0.000999] Calibrating delay loop (skipped), value calculated using timer frequency.. 6823.20 BogoMIPS (lpj=3411602) [ 0.000999] pid_max: default: 32768 minimum: 301 [ 0.000999] Security Framework initialized [ 0.001355] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes) [ 0.002974] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes) [ 0.003441] Mount-cache hash table entries: 256 [ 0.003595] Initializing cgroup subsys cpuacct [ 0.003599] Initializing cgroup subsys freezer [ 0.003637] ENERGY_PERF_BIAS: Set to 'normal', was 'performance' [ 0.003637] ENERGY_PERF_BIAS: View and update with x86_energy_perf_policy(8) [ 0.003643] CPU: Physical Processor ID: 0 [ 0.003645] CPU: Processor Core ID: 0 [ 0.003702] SMP alternatives: switching to UP code [ 0.011791] Freeing SMP alternatives: 12k freed [ 0.011835] Performance Events: unsupported p6 CPU model 42 no PMU driver, software events only. [ 0.011886] Brought up 1 CPUs [ 0.011998] Grant tables using version 2 layout. [ 0.012009] Grant table initialized [ 0.012034] NET: Registered protocol family 16 [ 0.012328] PCI: setting up Xen PCI frontend stub [ 0.015089] bio: create slab <bio-0> at 0 [ 0.015158] ACPI: Interpreter disabled. [ 0.015180] xen/balloon: Initialising balloon driver. [ 0.015180] xen-balloon: Initialising balloon driver. [ 0.015180] vgaarb: loaded [ 0.016126] SCSI subsystem initialized [ 0.016314] PCI: System does not support PCI [ 0.016320] PCI: System does not support PCI [ 0.016435] NetLabel: Initializing [ 0.016438] NetLabel: domain hash size = 128 [ 0.016440] NetLabel: protocols = UNLABELED CIPSOv4 [ 0.016447] NetLabel: unlabeled traffic allowed by default [ 0.016475] Switching to clocksource xen [ 0.017434] pnp: PnP ACPI: disabled [ 0.017501] NET: Registered protocol family 2 [ 0.017864] IP route cache hash table entries: 262144 (order: 9, 2097152 bytes) [ 0.019322] TCP established hash table entries: 524288 (order: 11, 8388608 bytes) [ 0.020376] TCP bind hash table entries: 65536 (order: 8, 1048576 bytes) [ 0.020497] TCP: Hash tables configured (established 524288 bind 65536) [ 0.020500] TCP: reno registered [ 0.020525] UDP hash table entries: 4096 (order: 5, 131072 bytes) [ 0.020564] UDP-Lite hash table entries: 4096 (order: 5, 131072 bytes) [ 0.020624] NET: Registered protocol family 1 [ 0.020658] PCI-DMA: Using software bounce buffering for IO (SWIOTLB) [ 0.020662] software IO TLB [mem 0xfb632000-0xff631fff] (64MB) mapped at [ffff8800fb632000-ffff8800ff631fff] [ 0.020750] platform rtc_cmos: registered platform RTC device (no PNP device found) [ 0.021378] HugeTLB registered 2 MB page size, pre-allocated 0 pages [ 0.023378] msgmni has been set to 9656 [ 0.023544] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253) [ 0.023549] io scheduler noop registered [ 0.023551] io scheduler deadline registered [ 0.023580] io scheduler cfq registered (default) [ 0.023650] pci_hotplug: PCI Hot Plug PCI Core version: 0.5 [ 0.023845] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled [ 0.024082] Non-volatile memory driver v1.3 [ 0.024085] Linux agpgart interface v0.103 [ 0.024207] Event-channel device installed. [ 0.024265] [drm] Initialized drm 1.1.0 20060810 [ 0.024268] [drm:i915_init] *ERROR* drm/i915 can't work without intel_agp module! [ 0.025145] brd: module loaded [ 0.025565] loop: module loaded [ 0.045646] Initialising Xen virtual ethernet driver. [ 0.198264] i8042: PNP: No PS/2 controller found. Probing ports directly. [ 0.199096] i8042: No controller found [ 0.199139] mousedev: PS/2 mouse device common for all mice [ 0.259303] rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0 [ 0.259353] rtc_cmos: probe of rtc_cmos failed with error -38 [ 0.259440] md: raid1 personality registered for level 1 [ 0.259542] nf_conntrack version 0.5.0 (16384 buckets, 65536 max) [ 0.259732] ip_tables: (C) 2000-2006 Netfilter Core Team [ 0.259747] TCP: cubic registered [ 0.259886] NET: Registered protocol family 10 [ 0.260031] ip6_tables: (C) 2000-2006 Netfilter Core Team [ 0.260070] sit: IPv6 over IPv4 tunneling driver [ 0.260194] NET: Registered protocol family 17 [ 0.260213] Bridge firewalling registered [ 5.360075] XENBUS: Waiting for devices to initialise: 25s...20s...15s...10s...5s...0s...235s...230s...225s...220s...215s...210s...205s...200s...195s...190s...185s...180s...175s...170s...165s...160s...155s...150s...145s...140s...135s...130s...125s...120s...115s...110s...105s...100s...95s...90s...85s...80s...75s...70s...65s...60s...55s...50s...45s...40s...35s...30s...25s...20s...15s...10s...5s...0s... [ 270.360180] XENBUS: Timeout connecting to device: device/vbd/51713 (local state 3, remote state 1) [ 270.360273] md: Waiting for all devices to be available before autodetect [ 270.360277] md: If you don't use raid, use raid=noautodetect [ 270.360388] md: Autodetecting RAID arrays. [ 270.360392] md: Scanned 0 and added 0 devices. [ 270.360394] md: autorun ... [ 270.360395] md: ... autorun DONE. [ 270.360431] VFS: Cannot open root device "xvda1" or unknown-block(0,0): error -6 [ 270.360435] Please append a correct "root=" boot option; here are the available partitions: [ 270.360440] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) [ 270.360444] Pid: 1, comm: swapper/0 Not tainted 3.5.7-gentoo #1 [ 270.360446] Call Trace: [ 270.360454] [<ffffffff813d2205>] ? panic+0xbe/0x1c5 [ 270.360459] [<ffffffff813d2358>] ? printk+0x4c/0x51 [ 270.360464] [<ffffffff815d5fb7>] ? mount_block_root+0x24f/0x26d [ 270.360469] [<ffffffff815d62b6>] ? prepare_namespace+0x168/0x192 [ 270.360474] [<ffffffff815d5ca7>] ? kernel_init+0x1b0/0x1c2 [ 270.360477] [<ffffffff815d5500>] ? loglevel+0x34/0x34 [ 270.360482] [<ffffffff813d5a64>] ? kernel_thread_helper+0x4/0x10 [ 270.360486] [<ffffffff813d4038>] ? retint_restore_args+0x5/0x6 [ 270.360490] [<ffffffff813d5a60>] ? gs_change+0x13/0x13 The config: name = "dom1" bootloader = "/usr/bin/pygrub" root = "/dev/xvda1 ro" extra = "3" # runlevel memory = 5000 disk = [ 'phy:/dev/md1,xvda1,w' ] # vif = [ 'ip=..., vifname=veth1' ] # none for now Here are some details on the Dom0 kernel (grepping for "xen"): CONFIG_XEN=y CONFIG_XEN_DOM0=y CONFIG_XEN_PRIVILEGED_GUEST=y CONFIG_XEN_PVHVM=y CONFIG_XEN_MAX_DOMAIN_MEMORY=500 CONFIG_XEN_SAVE_RESTORE=y CONFIG_PCI_XEN=y CONFIG_XEN_PCIDEV_FRONTEND=y # CONFIG_XEN_BLKDEV_FRONTEND is not set CONFIG_XEN_BLKDEV_BACKEND=y # CONFIG_XEN_NETDEV_FRONTEND is not set CONFIG_XEN_NETDEV_BACKEND=y CONFIG_INPUT_XEN_KBDDEV_FRONTEND=y CONFIG_HVC_XEN=y CONFIG_HVC_XEN_FRONTEND=y # CONFIG_XEN_WDT is not set # CONFIG_XEN_FBDEV_FRONTEND is not set # Xen driver support CONFIG_XEN_BALLOON=y # CONFIG_XEN_SELFBALLOONING is not set CONFIG_XEN_SCRUB_PAGES=y CONFIG_XEN_DEV_EVTCHN=y CONFIG_XEN_BACKEND=y CONFIG_XENFS=y CONFIG_XEN_COMPAT_XENFS=y CONFIG_XEN_SYS_HYPERVISOR=y CONFIG_XEN_XENBUS_FRONTEND=y CONFIG_XEN_GNTDEV=m CONFIG_XEN_GRANT_DEV_ALLOC=m CONFIG_SWIOTLB_XEN=y CONFIG_XEN_TMEM=y CONFIG_XEN_PCIDEV_BACKEND=m CONFIG_XEN_PRIVCMD=y CONFIG_XEN_ACPI_PROCESSOR=m And the DomU kernel (grepping for "xen"): CONFIG_XEN=y CONFIG_XEN_DOM0=y CONFIG_XEN_PRIVILEGED_GUEST=y CONFIG_XEN_PVHVM=y CONFIG_XEN_MAX_DOMAIN_MEMORY=500 CONFIG_XEN_SAVE_RESTORE=y CONFIG_PCI_XEN=y CONFIG_XEN_PCIDEV_FRONTEND=y CONFIG_XEN_BLKDEV_FRONTEND=y CONFIG_XEN_NETDEV_FRONTEND=y CONFIG_INPUT_XEN_KBDDEV_FRONTEND=y CONFIG_HVC_XEN=y CONFIG_HVC_XEN_FRONTEND=y # CONFIG_XEN_WDT is not set # CONFIG_XEN_FBDEV_FRONTEND is not set # Xen driver support CONFIG_XEN_BALLOON=y # CONFIG_XEN_SELFBALLOONING is not set CONFIG_XEN_SCRUB_PAGES=y CONFIG_XEN_DEV_EVTCHN=y # CONFIG_XEN_BACKEND is not set CONFIG_XENFS=y CONFIG_XEN_COMPAT_XENFS=y CONFIG_XEN_SYS_HYPERVISOR=y CONFIG_XEN_XENBUS_FRONTEND=y CONFIG_XEN_GNTDEV=m CONFIG_XEN_GRANT_DEV_ALLOC=m CONFIG_SWIOTLB_XEN=y CONFIG_XEN_TMEM=y CONFIG_XEN_PRIVCMD=y CONFIG_XEN_ACPI_PROCESSOR=m Any ideas what I'm doing wrong here? Thanks a lot!

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• Accessing clearcase view drive from virtual machine is slow

  - by PermanentGuest

  I have a windows XP virtual machine running under a Windows XP host. On the host : On the host clearcase 7.1.1.2 is installed. I have a dynamic view mapped onto some drive. The view has certain VOB/directory structure where my application DLLs from the nightly build and config files are stored. I run my application on the host machine which uses the DLLs and config files from the VOB and everything runs smooth. Now I want to move this set-up to a virtual machine. On the guest : I'm running the guest with a vm-player. I don't want to install clear-case on this as I don't want to expose this machine onto the network. The network setting in the guest is 'host-only'. I have mapped the host's clearcase view drive as a shared folder and I'm able to access this drive from the virtual machine. Also, the application is running. However, the problem is that the access of the clearcase drive from the virtual machine is very slow. I can experience this from the windows explorer. Due to this, the starting of my application takes several seconds in the virtual machine while on the guest it comes up pretty fast. My question is : Is there any way to speed up the performance? I have managed to copy some of the DLLs which don't change frequently to the virtual machine to improve the performance. However, there are still lot of DLLs which have to be taken from the clearcase drive as they change frequently. VMplayer version is : VM Player 3.0.1 build-227600 Both guest and host is : Windows XP service pack 3 Host clearcase is : clearcase 7.1.1.2

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• Host Name Resolution - ISA 2006 - VPN PPTP

  - by Brian Lee Jackson

  We are running an ISA 2006 server and PPTP VPN connection works fine. Clients are able to connect to internet, access Outlook, CRM, etc. The problem we are encountering is that host name resolution is not working. Example, when connected via VPN I can’t ping any box other than the VPN server by the host name. Nslookup also fails. I can ping everything fine via IP address. But for clients, they need to be able to access their “mapped” drives over the VPN which all are mapped by host name. I recently took over this position and it sounds like this used to work. What would be the best place to check first? I haven’t had much exposure to ISA and have been reading up a bit on installation procedures, etc. DNS is hosted and running on our domain controller, as well as WINS. It isn’t on the ISA box. Is there a firewall policy that perhaps got removed? What usually is required for host name resolution to pass through. Any help would be appreciated, thanks!

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• HP Laptop recognizes hard drive just long enough to install windows

  - by Joe

  I have an HP laptop, DV6500 (CTO). It refused to boot one day, so I ran some diagnostics (a friend lent me "Hirens Boot Disk", "UBCD" and "PC DR 6"). Everything passed, except for the hdd. I replaced the HDD with a used drive of unknown condition. Installed windows with no problems. Installed the wireless driver, tried to reboot ... no luck. So I went to Best Buy, bought a brand new Western Digital 320gb HDD. Put it in the machine, installed windows (vista home premium). Installed the wired networking driver. Tried to reboot. No luck. Put the first hdd back in the machine, reinstalled windows. Started to install some drivers, went to reboot, and the machine won't come back to life. Put the second hdd in the machine, rinse wash and repeat. I've replaced the memory, even though it passed diagnostics. Problem exists with both brand new memory, and old memory. The BIOS recognizes the hard drive. The computer freezes directly after the bios splash screen, and there is no hard drive activity light. I've tried two linux live distros (gentoo and ubuntu). Neither would run on this laptop, but will on a different HP laptop. UBCD and Hirens Boot Disk both ran, as did PC Doctor 6 which refuses to test anything (gets stuck at "enumerating hard disks"). Is there anything else I can try?

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• How to provide users with isolated drive letters in Windows 2008 R2 (Terminal Server)

  - by Pierre

  I need to be able to host several RDP sessions on a Terminal Server, where users of group A see a drive X: mapped to a given folder of the server and another group B see the same drive letter X: mapped to another folder. For instance : User 1, Group A X: --> C:\data\A User 2, Group A X: --> C:\data\A User 3, Group B X: --> C:\data\B User 4, Group C X: --> C:\data\C Is this possible. If so, how do I configure the virtual drive mapping so that the user has nothing special to do; i.e. I want the letter X: to be available to Remote Apps launched by the user, or if the user logs in to the remote desktop. Can I somehow use subst to get this to work? I would like to avoid, if possible, mounting drive letters on local shares (i.e. I don't like the idea of having to go through \\localhost\data-A to reach the user's data).

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• I think my laptop just died

  - by Joel Coehoorn

  I have a Dell 1330M that as of about 15 minutes ago will no longer POST. What happened was I was working, stepped away for a moment, and when I came back it was turned off. I thought that was odd, but turned it on and things seemed fine. About 1/2 hour later it crashed and restarted, but came up fine again. It did this once more. At this point I was starting to get worried, but I hadn't had any problems with the laptop before and every crash was after doing some work in a virtual machine that I don't often use, so I at put the blame there. It didn't feel like it was overheating anywhere and there's no ozone smell of overheated electronics. Then it crashed a final time and now when I turn it on all I see is a bright screen with a bunch of vertical lines (noise). I've tried removing the memory sticks one at a time, but I get the same result with either memory stick in either slot. With no memory at all it stops earlier in the POST process and the screen is completely blank (black, no backlight). As I type this, I hear a double beep from the system about once every 10 minutes. I'm pretty sure the hard drive is fine because it fails during post, before anything off the drive is needed. The power supply seems good because the screen is nice and bright. It's not the RAM because swapping that around made no difference. The leaves motherboard (which I doubt and can replace) and CPU (which just might be changable). Any ideas? Is there any hope for this laptop? I'm rather fond of it and I'd have a hard time replacing it with anything near as nice.

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• IBM BladeCenter S: Disk Configuration

  - by gravyface

  Have just the one storage bay right now (SAS 15K 600GB x 6) and have configured one storage pool in RAID 10 with 4 disks (and two global spares). For each blade, I've created a volume and mapped accordingly: Blade #1 400 GB Blade #2 200 GB Blade #3 100 GB Blade #4 100 GB When I boot up Blade 1 and enter into the UEFI Setup (F1) followed by the Adapters and UEFI Drivers LSI Logic Fusion MPT SAS Driver Utility, I see 4 disks: two are the on-board 73GB drives, the other two are 200GB each and assume I'm being presented with two logical disks from the volume I created and mapped to this blade. I was a bit surprised by this: I figured I would've been presented with one logical drive per volume, not two. I'm assuming I can just configure whatever RAID level I wish that supports two disks, but not really sure what the benefits/trade-offs here. Should I go with RAID 10 on top of RAID 10? RAID 0? Software RAID 0/1/10? Does it even matter? If this is "normal" to see two disks, then I'm going to likely just do some benchmarking and see if it makes a difference changing the RAID levels (my guess is no); if this is not normal, well, please let me know. :)

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• Windows 7 logon script net use fails

  - by Bryan

  Our network PCs currently consists of Windows XP Professional on a mixed 2008/2003 domain, with exception to one machine, which is a new Windows 7 PC we have bought for testing before we deploy the operating system. But we have discovered a problem with our logon script which automatically maps network drives for our users. The logon scripts are done via User GPOs, but the script itself is just a .cmd file using net use. The permissions are perfectly fine, as the same user can log on to a Windows XP machine and get their drives mapped without problem, but this one drive mapping constantly fails. This is repeatable using the net use command, and fails every time - it actually prompts the user for a username and password when executed interactively, yet if we enter \\server\share from a run dialog, the contents of the network share appear and are accessible without any further authentication. The Windows 7 PC (just like the XP systems) are domain members and the account being used is a domain account, which does have access to the share (as stated, it works fine on XP). I fail to understand what is happening here, as other shares on the server get mapped on the Windows 7 system. More info: The effective permissions of the share in question only grant the user 'list' permission on the root directory, the share permissions are 'everyone,full control'. I've created a new share with the same permissions just to test if it was down to the 'list' permissions on the root directory, but the Windows 7 machine maps this one fine.

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• Changing SkyDrive default location on Windows 8.1

  - by jmblack

  Update: This issue is due to the use of any non-local location for the SkyDrive folder. I've currently worked around this by using a local folder, but this has not resolved the original problem. I am trying to change the location where SkyDrive is located in Windows 8.1. This is the newly integrated SkyDrive, and not a downloadable client. There are a couple of similar questions on this site, but they pertain to Windows 8 and 8.1 Preview: Changing the SkyDrive default path in Windows 8.1 (Windows 8.1 Preview) How do I change the SkyDrive default folder in Windows (Windows 8) The SkyDrive folder is a system folder in 8.1, and like other system folders, has a Location tab in its properties that theoretically lets you change its location. I was able to do this with other system folders such as Downloads and Pictures, but there is an error when I try to change this for SkyDrive. Edit: The location that causes this error is a mapped network drive. The error does not occur when trying to move SkyDrive to another location on the same drive. There are no permission restrictions on the mapped network drive. Edit #2: This is the method I followed that produced the error: A screenshot of the error can be found here Has anyone else encountered this or have any information on this?

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• Would a PHP application benefit from being served from a RAM drive?

  - by Tom Marthenal

  I am in charge of hosting a PHP application that is large and slow, but easy to scale. The application is entirely static, with writable disk storage needed. We've profiled the application, and the main bottleneck appears to come from loading the application and not the work the application does. The application is not CPU-intensive, although it does use a fair amount of memory (think Magento). Currently we distribute it by having a series of servers with the same PHP files on their hard drive and a load balancer in front of them. Easy but expensive. I've been reading about RAM disks and the IO benefits they offer, and was wondering if they would be well-suited to PHP applications. Since PHP applications are loaded from disk for every request and often involve lots of different files (as opposed to being kept in memory like with a Java application), I would figure that disk performance can be a severe bottleneck. Would placing the PHP files on a RAM disk and using the mount point as Apache's document root offer performance benefits? A startup script could create the RAM drive and then copy the files (which are plain-text and small) from a permanent location to the temporary RAM drive. Does this make sense, or should I just trust the linux kernel to cache the appropriate files in memory by itself?

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• Is it possible to map static IP to computer name instead of MAC address?

  - by xenon

  I have a number of computers with different hostnames connected to the network. They currently hold a static IP address based on their MAC address. In other words, the static IP address is mapped to their MAC address. This gives rise to a problem and that's when we swap the harddrive from one computer to another, the MAC address becomes different and the application we are running on the harddrive has problem getting the right static IP for it to work. We can't configure the IP address in the application all the time. And changing the static IP addresses to re-map to the computer's new MAC address can be quite a pain. Since all the computers have a unique computer name as their hostname, is it possible to configure such that when these computers grab IP addresses from the DHCP server, DHCP will learn about their hostname and assign the correct IP address? This is to say, the static IP is mapped to the computers' hostname instead of their MAC address. All the computers are running on Windows 7. Would this be possible? If so how should I go about do this?

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• Separate Certificate by Subdomain (With multiple IPs)

  - by Brian

  Note: Yes, I realize this problem is easier to solve by just using 1 multi-domain or wildcard certificate. I wish to have an ASP.NET site running on IIS with 2 SSL domains sharing 1 web application but using separate certificates. Assuming I have 2 certificates, this can be solved on IIS7 as follows: Web Application1: Binding 1: http, 80, IP Address *, Host Name * Binding 2: https, 443, IPADDRESS1, using CERTDOMAIN1 (DOMAIN1 resolves to IPADDRESS1) Binding 3: https, 443, IPADDRESS2, using CERTDOMAIN2 (DOMAIN2 resolves to IPADDRESS2) That is to say, 2 certificates and 2 ip addresses, but both mapped to the same web application. In IIS6, the closest I have been able to come to this configuration is: Web Application1: Binding 1: http, 80, IPADDRESS1 Binding 2: https, 443, IPADDRESS1, using CERTDOMAIN1 (DOMAIN1 resolves to IPADDRESS1) Web Application2: Binding 1: http, 80, IPADDRESS2 Binding 2: https, 443, IPADDRESS2, using CERTDOMAIN2 (DOMAIN2 resolves to IPADDRESS2) That is to say, 2 certificates and 2 IP addresses, 2 web applications, both mapped to the same file location. The IIS6 solution is not optimal. Even if sharing an application pool, there are still costs associated with running the same site as two applications. Is upgrading from IIS6 to IIS7 a legitimate way to resolve this problem? Is there an IIS6 way to map 2 IP addresses within the same web application to different certificates?

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• MysqlTunner and query_cache_size dilemma

  - by wbad

  On a busy mysql server MySQLTuner 1.2.0 always recommends to add query_cache_size no matter how I increase the value (I tried up to 512MB). On the other hand it warns that : Increasing the query_cache size over 128M may reduce performance Here are the last results: >> MySQLTuner 1.2.0 - Major Hayden <[email protected]> >> Bug reports, feature requests, and downloads at http://mysqltuner.com/ >> Run with '--help' for additional options and output filtering -------- General Statistics -------------------------------------------------- [--] Skipped version check for MySQLTuner script [OK] Currently running supported MySQL version 5.5.25-1~dotdeb.0-log [OK] Operating on 64-bit architecture -------- Storage Engine Statistics ------------------------------------------- [--] Status: +Archive -BDB -Federated +InnoDB -ISAM -NDBCluster [--] Data in InnoDB tables: 6G (Tables: 195) [--] Data in PERFORMANCE_SCHEMA tables: 0B (Tables: 17) [!!] Total fragmented tables: 51 -------- Security Recommendations ------------------------------------------- [OK] All database users have passwords assigned -------- Performance Metrics ------------------------------------------------- [--] Up for: 1d 19h 17m 8s (254M q [1K qps], 5M conn, TX: 139B, RX: 32B) [--] Reads / Writes: 89% / 11% [--] Total buffers: 24.2G global + 92.2M per thread (1200 max threads) [!!] Maximum possible memory usage: 132.2G (139% of installed RAM) [OK] Slow queries: 0% (2K/254M) [OK] Highest usage of available connections: 32% (391/1200) [OK] Key buffer size / total MyISAM indexes: 128.0M/92.0K [OK] Key buffer hit rate: 100.0% (8B cached / 0 reads) [OK] Query cache efficiency: 79.9% (181M cached / 226M selects) [!!] Query cache prunes per day: 1033203 [OK] Sorts requiring temporary tables: 0% (341 temp sorts / 4M sorts) [OK] Temporary tables created on disk: 14% (760K on disk / 5M total) [OK] Thread cache hit rate: 99% (676 created / 5M connections) [OK] Table cache hit rate: 22% (1K open / 8K opened) [OK] Open file limit used: 0% (49/13K) [OK] Table locks acquired immediately: 99% (64M immediate / 64M locks) [OK] InnoDB data size / buffer pool: 6.1G/19.5G -------- Recommendations ----------------------------------------------------- General recommendations: Run OPTIMIZE TABLE to defragment tables for better performance Reduce your overall MySQL memory footprint for system stability Increasing the query_cache size over 128M may reduce performance Variables to adjust: *** MySQL's maximum memory usage is dangerously high *** *** Add RAM before increasing MySQL buffer variables *** query_cache_size (> 192M) [see warning above] The server has 76GB ram and dual E5-2650. The load is usually below 2. I appreciate your hints to interpret the recommendation and optimize the database configs.

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• printer assignments for windows xp workstations within an active directory environment

  - by another_netadmin

  I'm using the following script to handle removing any old networked printers from machines and then assigning the propper ones and making one of them the default. This script is assigned to the OU the workstations reside in and uses group policy loopback so all users that login will get the appropriate printers mapped for them. I tried to use the new Printer Manager as part of W2K3 R2 but when assigning the default this way I get an error that the printer doesn't exist so I'm back to using the script. One flaw that I'm noticing is that it won't remove any printers that happen to be mapped from an RDP session (we don't see this everywhere but there are a few locations). Is there any way to enumerate all RDP printers and remove them similar to how I'm enumerating and removing networked printers? ' ' Printers.vbs - Windows Logon Script. ' RemovePrinters AddPrinters Sub RemovePrinters() On Error Resume Next Dim strPrinter Set objNetwork = WScript.CreateObject("WScript.Network") Set colPrinters = objNetwork.EnumPrinterConnections For i = 0 to colPrinters.Count -1 Step 2 strPrinter=CStr(colPrinters.Item(i+1)) If Not InStr(strPrinter,"\\") = 0 Then objNetwork.RemovePrinterConnection strPrinter, True, True End If Next End Sub Sub AddPrinters() On Error GoTo 0 Set objNetwork = CreateObject("WScript.Network") objNetwork.AddWindowsPrinterConnection "\\printers1\JH120-DELL5310" objNetwork.SetDefaultPrinter "\\printers1\Jh120-DELL5310" End Sub

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• What is the typical maximum number of database connections for Oracle running on Windows server ?

  - by Sake

  We are maintaining a database server that serve a large number of clients. Each client typically running serveral client-applications. The total number of connections to the database server (Oracle 9i) is reaching 800 connections on peak load. The windows 2003 server is starting to run out of memory. We are now planning to move to 64bit Windows in order to gain higher memory capability. As a developer I suggest moving to multi-tier architecture with conneciton pooling, which I believe is a natural solution to this problem. However, in order to support my idea, I want the information on: what exactly is the typical number of connections allowed for Oracle database ? What is the problem when the number connections is too high ? Too much memory comsumption ? or too many sockets opened ? or too many context switching between threads ? To be a little bit specific, how could Oracle Forms application scale to thousand of users without facing this problem ? Shall Oracle RAC applied to this case ? I'm sure the answer to this question should depend on quite a number of factors, like the exact spec of the hardware being used. I'm expecting a rough estimation or some experience from the real world.

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• Video adapter problem on new motherboard

  - by Dmitriy Matveev

  Something bad happened to my PC several days ago. I wasn't near my PC, so I have no idea about what happened it was just halted. When I tried to boot it was entering infinite loops of a few seconds power up (cpu, hdds, etc) and then power down. I've tried to boot the system with no additional components (that includes hdd, video, network adapters and even memory) connected and that didn't solved the problem, so I've made a decision that most likely it's either some a problem with power unit or with motherboard. I've tried to replace my power unit by another one (which was expected to be working) and the problem didn't resolved again. I've bought a new MB (ASUS P5KPL-AM SE) and tried to get it running with my old CPU and memory (I hope it's still alive). Since this MB include on-board video I've tried to run the PC without installation of mine video. The PC wasn't running and the BIOS was beeping one long signal following by two short (Does it means a video problem?). After that I've installed my video adapter to PCI-E slot and tried to boot the system again and the BIOS was beeping the same. I don't get it. I may expect some problem with CPU and/or memory since I don't know what happened to my PC (maybe some power failure or something different), but not with video and not with on-board video on newly bought MB. How can I understand what's wrong with my system now?

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• Windows 7 Icons, Buttons, and Tabs corrupted...Professional 32-bit

  - by xhyperx

  The other day, about two or three ago, I was simply typing in a Microsoft Word document when my screen froze. After a few moments, it went black...I thought it was my vid hardware (dual nVidia 9800 GTs). Anyway, I did a hard reboot, and chose to Start Normally. The system blue screened telling me there was a failure in the Memory Manager. So then I thought maybe a RAM failure or vid memory failure. I attempted reboot again, this time I got presented with the option to repair windows...so I went with that. The repair app finished and did an auto reboot. This time I got all the way back to my desktop where in a matter of a about 30 seconds, the system blue screened again and pointed to the Memory Manager as the area of cause. Again I rebooted, the repair thingy came up again and I allowed it to do its thing. Deciding if the same failure occured I'd begin pulling hardware to see at what point I may have found the possibly defective party. However, this time it rebooted, I got back to desktop and no crash. All looked well, untill I looked at the baloon messages when hovering over the System Bar icons. Also when I opened any of my browsers, the tabs had no text, and any window that pops up that has regular buttons (OK, Cancel, etc., etc.) looks weird. The buttons are really really long and have no text. So it seems like the system is once again running smoothly, however something has gotten corrupted.. something relating to drawing basic windows user interface objects. Help...all ideas are respected and appreciated. Have a great day everyone!

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• Windows 7 Icons, Buttons, and Tabs corrupted...Professional 32-bit

  - by xhyperx

  The other day, about two or three ago, I was simply typing in a Microsoft Word document when my screen froze. After a few moments, it went black...I thought it was my vid hardware (dual nVidia 9800 GTs). Anyway, I did a hard reboot, and chose to Start Normally. The system blue screened telling me there was a failure in the Memory Manager. So then I thought maybe a RAM failure or vid memory failure. I attempted reboot again, this time I got presented with the option to repair windows...so I went with that. The repair app finished and did an auto reboot. This time I got all the way back to my desktop where in a matter of a about 30 seconds, the system blue screened again and pointed to the Memory Manager as the area of cause. Again I rebooted, the repair thingy came up again and I allowed it to do its thing. Deciding if the same failure occured I'd begin pulling hardware to see at what point I may have found the possibly defective party. However, this time it rebooted, I got back to desktop and no crash. All looked well, untill I looked at the baloon messages when hovering over the System Bar icons. Also when I opened any of my browsers, the tabs had no text, and any window that pops up that has regular buttons (OK, Cancel, etc., etc.) looks weird. The buttons are really really long and have no text. So it seems like the system is once again running smoothly, however something has gotten corrupted.. something relating to drawing basic windows user interface objects. Help...all ideas are respected and appreciated. Have a great day everyone!

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• I really need help resolving a Window Vista BSOD (Blue Screen Crash) on my desktop

  - by anonymous

  Hi, thanks for taking the time to read this. I'll get straight to the details. My desktop is on the fritz; it keeps going to blue screen with the stop message of 0x0000007E immediately after the loading bar of vista, right before transitioning to the account selection screen. My desktop runs on a dual-core 32-bit processor with windows Vista Home(?) installed. I have 3 GB of ram as two separate modules, a 1GB acer module and a 2GB geil module. I have an ati video card, unfortunately I cannot recall the exact name but the chipset is ATI and the manufacturer is Sapphire and the card is on the lower end. My hard drive is 320GB (i think) partitioned into two. The C:\ partition is red lined, while the D:\ partition is still pretty empty. As per the advice of my friend, i tried restarting the system with the graphics card removed. Upon failure, i repeated the process removing one RAM module one at a time, but the system still failed to load. Vista would attempt to repair the system and it would initially report that the system was fixed, but vista really failed to fix the problem. After removing the memory modules, vista started to report it's inability to fix the problem. I tried running on safe mode and the driver listing would always stop at crcdisk.sys. I ran memory diagnostics using the windows memory diagnostic tool found in the screen after vista's failed attempt to fix the problem with no luck. the problem details are as such: Problem Event Name : StartupRepairV2 Problem Signature 01: AutoFailover 02: (vista's version number?) 03: 6 04: 720907 05: 0x7e 06: 0x7e 07: 0 08: 2 09: WrpRepair 10: 0 OS Version: 6.0.6000.2.0.0.256.1 Locale ID 1033 any correct advice would be appreciated as i really need my pc to work so i can work on my projects. kinda sad, but i'm college of computer science and i have no idea what to do :P

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• Which would be more reliable for data archival - SD card or a generic USB thumbdrive?

  - by Visitor

  I've been thinking lately what should I preferably use for data storage and archival. I will say in advance that I do not use flash memory as the only storage media - I also keep my data on the hard drives and optical disks - flash memory is but one of the several backup solutions that duplicate each other. For the flash memory however I do have a choice - to use a generic USB thumbdrive or a SD card. Are there any indications that SD cards may be better and more reliable? From browsing people's review on the web I see that many complaints about USB sticks have to do with them completely failing, losing file system and stop being recognized by the OS. At the same time, most of the complaints for SD cards deal with just write speeds not holding up to the promise - failure reports are but a portions of those for the USB sticks. Are SD cards indeed more reliable? Am I also correct in my assumptions that SD cards use higher grade NAND chips than USB thumbdrives? At least, for class 10 cards, because the specification dictates the minimum performance and the manufacturers have to preselect better chips. While it is common for USB sticks to promise high speeds "up to XX MB/sec" but the reality is they very often deliver speeds 2-3 times less than promised. Do SD cards get better NAND chips and USB thumbdrives receive the discarded chips? Any thoughts would be appreciated.

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• Should I completely turn off swap for linux webserver?

  - by Poma

  Recently my friend told me that it is a good idea to turn off swap on linux webservers with enough memory. My server has 12 GB and currently uses 4GB (not counting cache and buffers) under peak load. His argument was that in a normal situation server will never use all of its RAM so the only way it can encounter OutOfMemory situation is due to some bug/ddos/etc. So in case swap is turned off system will run out of memory that will eventually crash the program hogging memory (most likely the web server process) and probably some other processes. In case swap is turned on it will eat both RAM and swap and eventually will result in the same crash, but before that it will offload crucial processes like sshd to swap and start to do a lot of swap operations resulting in major slowdown. This way when under ddos system may go into a completely unusable condition due to huge lags and I probably will not be unable to log in and kill webserver process or deny all incoming traffic (all but ssh). Is this right? Am I missing something (like the fact that swap partition is very useful in some way even if I have enough RAM)? Should I turn it off?

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• Mysql InnoDB and quickly applying large updates

  - by Tim

  Basically my problem is that I have a large table of about 17,000,000 products that I need to apply a bunch of updates to really quickly. The table has 30 columns with the id set as int(10) AUTO_INCREMENT. I have another table which all of the updates for this table are stored in, these updates have to be pre-calculated as they take a couple of days to calculate. This table is in the format of [ product_id int(10), update_value int(10) ]. The strategy I'm taking to issue these 17 million updates quickly is to load all of these updates into memory in a ruby script and group them in a hash of arrays so that each update_value is a key and each array is a list of sorted product_id's. { 150: => [1,2,3,4,5,6], 160: => [7,8,9,10] } Updates are then issued in the format of UPDATE product SET update_value = 150 WHERE product_id IN (1,2,3,4,5,6); UPDATE product SET update_value = 160 WHERE product_id IN (7,8,9,10); I'm pretty sure I'm doing this correctly in the sense that issuing the updates on sorted batches of product_id's should be the optimal way to do it with mysql / innodb. I'm hitting a weird issue though where when I was testing with updating ~13 million records, this only took around 45 minutes. Now I'm testing with more data, ~17 million records and the updates are taking closer to 120 minutes. I would have expected some sort of speed decrease here but not to the degree that I'm seeing. Any advice on how I can speed this up or what could be slowing me down with this larger record set? As far as server specs go they're pretty good, heaps of memory / cpu, the whole DB should fit into memory with plenty of room to grow.

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• Can't connect to wi-fi hotspot in Ubuntu 11.10

  - by ht3t

  I'm new to Ubuntu. I'm having a wireless network problem in Ubuntu 11.10. I made a hotspot using Connectify from a computer which is running Windows 7. I can access it in Windows 7 but not in Ubuntu 11.10. Every time I access it,I get a message "disconnected". I'm using msi fx 400 notebook with Intel Centrino wireless -N 1000 wireless card. Ubuntu version is 11.10 with KDE desktop. $ sudo lshw -c network [sudo] password for ht3t: *-network description: Wireless interface product: Centrino Wireless-N 1000 vendor: Intel Corporation physical id: 0 bus info: pci@0000:06:00.0 logical name: wlan0 version: 00 serial: 00:26:c7:56:b8:f0 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlagn driverversion=3.0.0-12-generic firmware=39.31.5.1 build 35138 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn resources: irq:44 memory:e7400000-e7401fff *-network description: Ethernet interface product: RTL8111/8168B PCI Express Gigabit Ethernet controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:07:00.0 logical name: eth0 version: 06 serial: 40:61:86:b6:b1:a2 size: 100Mbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl_nic/rtl8168e-2.fw IP=192.168.21.107 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s resources: irq:41 ioport:9000(size=256) memory:e6004000-e6004fff memory:e6000000-e6003fff I can't do anything without internet connection. How can I fix this?

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• How to provide users with isolated drive letters in Windows 2008 R2 (Terminal Server) [migrated]

  - by Pierre

  I need to be able to host several RDP sessions on a Terminal Server, where users of group A see a drive X: mapped to a given folder of the server and another group B see the same drive letter X: mapped to another folder. For instance : User 1, Group A X: --> C:\data\A User 2, Group A X: --> C:\data\A User 3, Group B X: --> C:\data\B User 4, Group C X: --> C:\data\C Is this possible. If so, how do I configure the virtual drive mapping so that the user has nothing special to do; i.e. I want the letter X: to be available to Remote Apps launched by the user, or if the user logs in to the remote desktop. Can I somehow use subst to get this to work? I would like to avoid, if possible, mounting drive letters on local shares (i.e. I don't like the idea of having to go through \\localhost\data-A to reach the user's data).

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