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which exact decimal value is meant here for S64_MIN in CRUSH Mapper

by Bobby

Hi, In *mapper.c* file of Ceph CRUSH, I am trying to understand the definition of a linux macro ```*S64_MIN*``` used in the following ```*else*``` condition i.e. ```*draw = S64_MIN*```. Which exact decimal value is meant here for ```*S64_MIN*```? ``` if (weights[i]) { u = hash(bucket->h.hash, x, ids[i], r); u &= 0xffff; ln = crush_ln(u) - 0x1000000000000ll; __s64 draw = div64_s64(ln, weights[i]); } else { __s64 draw = S64_MIN; // #define S64_MAX ((s64)(U64_MAX >> 1)) // #define S64_MIN ((s64)(-S64_MAX -1)) } if (i == 0 || draw > high_draw) { high = i; high_draw = draw; } } return bucket->h.items[high]; } Thanks Bobby !

3 years, 9 months

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[ANN] A framework for deploying Octopus using cephadm in the cloud

by Patrick Donnelly

Hello all, There's a framework [0] I've been working on for a while to deploy Ceph in the cloud. For now, this is done through the Linode, LLC cloud provider [1]. Primarily I use this for testing CephFS performance/behavior. For example, it's fairly simple to create a decent sized test cluster with 150GB MDSs and 16x 16GB OSDs for a humble 1.7TB usable storage. Then provision 100+ client machine nodes for executing workflows against the Ceph cluster. This has been very useful for isolating aberrant behaviors that are only uncovered at scale. All of the code/playbooks I use for this purpose are also in the ceph-linode repository. Early versions of this project used ceph-ansible but I have updated the code to use the new cephadm deployment technology [2] in Ceph Octopus release. The ansible playbook to deploy the cluster [3] is delightfully simple. Anyway, I thought it may be useful to the broader community to have an option to try out cephadm on a throwaway cluster for pennies per hour through a VPS provider. Getting a small cluster started should take less than 10 minutes by following the README. I hope some folks out there find this useful for their own testing. Feedback is welcome. [0] https://github.com/batrick/ceph-linode [1] https://www.linode.com/ [2] https://docs.ceph.com/docs/master/cephadm/ [3] https://github.com/batrick/ceph-linode/blob/master/cephadm.yml Full disclosure: I have no relationship with Linode except as a customer. -- Patrick Donnelly, Ph.D. He / Him / His Principal Software Engineer Red Hat Sunnyvale, CA GPG: 19F28A586F808C2402351B93C3301A3E258DD79D

3 years, 9 months

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Boost your grades using assignment help online services

by kevin wick

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3 years, 9 months

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What are smart ways to fix HP printer offline?

by masonlava77＠gmail.com

HP printer offline is one of the most common errors experienced by countless users. This offline problem is showing a warning message that printing machine does not print any kind of document. I am passing through technical issue from the last week. I don’t have solutions for this offline error, hence my all printing tasks are pending. Why does my HP printer keep going offline? I look for expert’s assistance. So anyone can guide me properly for solving this issue. https://www.hpprintersupportpro.com/blog/stop-my-hp-printer-from-going-offl…

3 years, 9 months

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HP Officejet pro 802 setup

by cfaray3536＠gmail.com

Get the quick solution to establish the hp Officejet pro 8028 setups without any interruptions. However, if you still have issues or errors and you are stuck in between the process then all you need to do is to visit the HP website and get assistance from the customer support team https://hp-printer-support.us/blog/hp-officejet-pro-8028-setup/

3 years, 9 months

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What is Mcafee Login?

by sophia.smith0321＠gmail.com

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3 years, 9 months

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unbalanced pg/osd allocation

by Budai Laszlo

Dear all, We have a ceph cluster where we are have configured two SSD only pools in order to use them as cache tier for the spinning discs. Altogether there are 27 SSDs organized on 9 hosts distributed in 3 chassis. The hierarchy looks like this: $ ceph osd df tree | grep -E 'ssd|ID' ID CLASS WEIGHT REWEIGHT SIZE USE AVAIL %USE VAR PGS TYPE NAME -40 8.26199 - 8.26TiB 5.78TiB 2.48TiB 70.02 5.77 - root ssd-root -50 2.75400 - 2.75TiB 1.93TiB 845GiB 70.02 5.77 - chassis c1-ssd -41 0.91800 - 940GiB 651GiB 289GiB 69.23 5.71 - host c1-h01-ssd 110 ssd 0.30600 1.00000 313GiB 199GiB 115GiB 63.37 5.22 77 osd.110 116 ssd 0.30600 1.00000 313GiB 219GiB 94.3GiB 69.91 5.76 89 osd.116 119 ssd 0.30600 1.00000 313GiB 233GiB 80.2GiB 74.41 6.13 87 osd.119 -42 0.91800 - 940GiB 701GiB 239GiB 74.61 6.15 - host c1-h02-ssd 112 ssd 0.30600 1.00000 313GiB 228GiB 84.9GiB 72.91 6.01 85 osd.112 117 ssd 0.30600 1.00000 313GiB 245GiB 67.9GiB 78.32 6.46 97 osd.117 122 ssd 0.30600 1.00000 313GiB 227GiB 85.8GiB 72.61 5.99 87 osd.122 -43 0.91800 - 940GiB 622GiB 318GiB 66.21 5.46 - host c1-h03-ssd 109 ssd 0.30600 1.00000 313GiB 192GiB 122GiB 61.15 5.04 77 osd.109 115 ssd 0.30600 1.00000 313GiB 206GiB 107GiB 65.79 5.42 79 osd.115 120 ssd 0.30600 1.00000 313GiB 225GiB 88.7GiB 71.70 5.91 90 osd.120 -51 2.75400 - 2.75TiB 1.93TiB 845GiB 70.02 5.77 - chassis c2-ssd -46 0.91800 - 940GiB 651GiB 288GiB 69.31 5.71 - host c2-h01-ssd 125 ssd 0.30600 1.00000 313GiB 211GiB 103GiB 67.22 5.54 81 osd.125 130 ssd 0.30600 1.00000 313GiB 233GiB 80.4GiB 74.33 6.13 89 osd.130 132 ssd 0.30600 1.00000 313GiB 208GiB 105GiB 66.38 5.47 79 osd.132 -45 0.91800 - 940GiB 672GiB 267GiB 71.54 5.90 - host c2-h02-ssd 126 ssd 0.30600 1.00000 313GiB 216GiB 97.4GiB 68.90 5.68 87 osd.126 129 ssd 0.30600 1.00000 313GiB 207GiB 106GiB 66.12 5.45 80 osd.129 134 ssd 0.30600 1.00000 313GiB 249GiB 63.9GiB 79.61 6.56 99 osd.134 -44 0.91800 - 940GiB 650GiB 289GiB 69.20 5.70 - host c2-h03-ssd 123 ssd 0.30600 1.00000 313GiB 201GiB 112GiB 64.23 5.29 76 osd.123 127 ssd 0.30600 1.00000 313GiB 217GiB 96.1GiB 69.31 5.71 85 osd.127 131 ssd 0.30600 1.00000 313GiB 232GiB 81.2GiB 74.06 6.11 92 osd.131 -52 2.75400 - 2.75TiB 1.93TiB 845GiB 70.02 5.77 - chassis c3-ssd -47 0.91800 - 940GiB 628GiB 311GiB 66.86 5.51 - host c3-h01-ssd 124 ssd 0.30600 1.00000 313GiB 204GiB 109GiB 65.13 5.37 78 osd.124 128 ssd 0.30600 1.00000 313GiB 202GiB 111GiB 64.59 5.32 76 osd.128 133 ssd 0.30600 1.00000 313GiB 222GiB 91.3GiB 70.86 5.84 86 osd.133 -48 0.91800 - 940GiB 628GiB 312GiB 66.80 5.51 - host c3-h02-ssd 108 ssd 0.30600 1.00000 313GiB 220GiB 92.9GiB 70.35 5.80 86 osd.108 114 ssd 0.30600 1.00000 313GiB 209GiB 105GiB 66.58 5.49 82 osd.114 121 ssd 0.30600 1.00000 313GiB 199GiB 114GiB 63.46 5.23 79 osd.121 -49 0.91800 - 940GiB 718GiB 222GiB 76.40 6.30 - host c3-h03-ssd 111 ssd 0.30600 1.00000 313GiB 219GiB 94.4GiB 69.87 5.76 84 osd.111 113 ssd 0.30600 1.00000 313GiB 241GiB 72.2GiB 76.95 6.34 96 osd.113 118 ssd 0.30600 1.00000 313GiB 258GiB 55.2GiB 82.39 6.79 101 osd.118 The rule used for the two pools is the following: { "rule_id": 1, "rule_name": "ssd", "ruleset": 1, "type": 1, "min_size": 1, "max_size": 10, "steps": [ { "op": "take", "item": -40, "item_name": "ssd-root" }, { "op": "chooseleaf_firstn", "num": 0, "type": "chassis" }, { "op": "emit" } ] } both pools have the size 3, and the total number of PGs is 768 (256+512). As you can see from the previous table (the PG column) there is a significant difference between the OSD with the largest number of PGs (101PGs on osd.118) and the ones with the smallest number (76 PGs on osd.123). The ratio between the two is 1.32. So OSD 118 has more chances to receive data then OSD 123, and we can see that indeed osd.118 is the one storing the most data (82.39% full in the above table). I would like to re balance the PG/OSD allocation. I know that I can play around with the OSD weights (currently .306 for all the OSDs), but I wonder if there is any drawback for this on the long run? Are you aware of any reason why I should NOT modify the weights (and leave those modifications permanent)? Any ideas are welcome :) Kind regards, Laszlo

3 years, 9 months

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Fix tech jumble up in Cash App? Contact help gathering and Talk to a Cash App Representative.

by mary smith

Any application isn't sans botch and thusly if you face an issue with the application, by then you ought to go to the assistance locales to get your issue isolated and fixed. You can likewise use another other choice and that is to dial the help number and get the issue fixed by choosing to Talk to a Cash App Representative. https://www.customercare-email.com/customer-service/cash-app.html

3 years, 9 months

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Issue in the Epson interface? Discover support from Epson Customer Service.

by mary smith

If you face an interface issue in your device, by then you ought to reboot it. In any case, if the issue doesn't get disentangled, by then you can take help from the tech consultancies and use their exploring strategies. You can similarly contact the Epson Customer Service for discovering support. https://www.epsonprintersupportpro.net/

3 years, 9 months

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Migrating to managed OSDs with ceph orch

by lstockner＠genesiscloud.com

Hi all, I just updated a Ceph cluster from Nautilus to Octopus and followed the documentation in order to migrate from the original ceph-ansible setup to cephadm. Overall, this worked great, but there's one part that I couldn't figure out yet and that doesn't seem to be documented: How do I migrate the OSDs to the new managed approach using service specifications? Currently, "ceph orch ps" shows me each OSD and "ceph orch ls" lists them as "osd.2", with "9/0" running with unmanaged placement (iirc osd.2 was the first one I adopted so that's probably where the name comes from). I tried writing a service specification that should match the current deployment and applying that, but the new entries are just sitting there at 0/3 running. For node-exporter, I solved this problem by just removing the old containers and services manually and waiting for Ceph to recreate the new ones, but for OSDs that approach doesn't really seem practical (unless it was a matter of just stopping/removing the old container, but that doesn't seem to do the trick in my tests). Is there a proper way to do this? Or is the cluster just stuck with unmanaged OSDs if it was created without cephadm? Thanks, Lukas

3 years, 9 months

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