Truenas deduplication verify. You'd need a crapton of RAM.

Truenas deduplication verify 00. reckon tens of GB more. 扩展性和效率 On - Select to use deduplication. 3. It's generally recommended that people don't use it. I have 32GB RAM and only about 650GB allocated in my dedup'd array so I should have plenty of memory. OpenZFS 2. When I am copying data to a dataset when dedup is ON or VERIFY, the connection drops every minute, sometimes every 30 seconds, sometimes every 2 minutes. The default value is off. The default deduplication checksum is sha256 (this may change in the future). An "offline dedup", AKA dedup as offered by NetApp, is one of those oft-requested features that are much easier to request than Online Deduplication would be too expensive (1,5TB RAM. Choose wisely as some data you may want to store might not be de-duplicatable, thus waste system CPU time I have an existing pool (RAID1 / Mirror) with SSD cache, I was planning on adding some datasets with deduplication and with some supporting NVMe dedup drives for the dedup tables. My large Truenas Scale ZFS pool had checksum errors on one of the 4xRaidZ1 VDEVs in the pool. New posts New resources The TrueNAS forums occasionally have people who come across ZFS de-duplicate, and want to If using a TrueNAS 13. 04-BETA1 64GB RAM 10th Generation Intel i7 Samsung NVME SSD 1TB, QVO SSD 1TB Boot from Samsung Portable T7 SSD USBC CASE: Fractal Define 7 running TrueNAS SCALE 24. It’s no secret that ZFS and deduplication have had performance issues in the past. com/r/freenas/comments/evlgjw/using_deduplication_safely/ffwxwnf/ ZFS去重有三种方式：文件级，块状级，字节级. 1 SCALE Cluster: 2x Intel NUCs running TrueNAS SCALE 24. Forums. 3) doesn't have an apt, doesn't have a yum, doesn't have anything like that. Using TrueNAS Snapshots TrueNAS uses the OpenZFS file system, which supports read-only file system snapshots. 10 and not fully supported. 2 x 16GB intel optane as dedupliction. I ZVOL I created for this testing Important Announcement for the TrueNAS Community. You could always run fdupes, then. 5") - - VMs/Jails; 1 xASUS Z10PA-D8 (LGA 2011-v3, Intel C612 PCH, ATX) - - Dual socket MoBo; 2 xWD Green 3D NAND (120GB, 2. The problem with current ZFS dedup is it has to match exactly So if the same data is shifted a few bytes forward, it will not match There's a new version of dedup in the works, maybe it will land this year The Transport selector determines the method to use for the replication: SSH is the standard option for sending or receiving data from a remote system, but SSH+NETCAT is faster for replications within completely secure networks. reddit. Follow asked Aug 20, 2019 at 16:54. Joined Feb 2, 2018 Messages 1,401. Main: TrueNAS 13 Supermicro X11SSM-F with Intel Core i3-6300 and 1 *16GB Samsung ECC DDR4 2133MHz 6 * WD30EFRX WD Red 3TB in RAIDZ2 and 1*120GB SanDisk SSD (boot) Sharkoon T9 Value with 2 * Icy Dock FatCage MB153SP-B 3-in-2 drive cages The collaborative project between Klara and iXsystems on "Fast Dedup" has been completed and presented as a series of pull requests (PR's) to the OpenZFS Github, ready for public review We're targeting this "Fast Dedup" functionality to release, hopefully alongside RAIDZ expansion, with TrueNAS SCALE 24. And and the end, enabling deduplication would be Deduplication Qutoa Dialog The Deduplication Quota for poolname shows the Quota dropdown list with three options for setting the maximum size limit the deduplication table can reach. Recordsize: Run zfs get recordsize main/user SSD/user to verify if the block sizes differ. "The dedup tables used during deduplication need ~8 GB of RAM per 1TB of data to be deduplicated" Für ein Dataset mit randvollen 4 If using a TrueNAS 13. The TrueNAS Documentation Hub hosts but does not validate or maintain articles within this section. The goal is to have a simple ZFS mirror and backup data to various sources, ZFS replication is one of these alternatives. I figured I’d checkout the API and support and community. Provides general information on ZFS deduplication in TrueNAS, hardware recommendations, and useful deduplication CLI commands. Depends on the data transferred. Documentation for applications within the Community train is created and maintained by members of the TrueNAS community. You very likely won't have enough duplicated blocks to actually see any benefit from deduplication. storage. The more data you write to a deduplicated volume the more memory it requires, and there is no De-duplication is enabled on datasets, zVols, or entire pools. I would add, based on my personal experience, that if you really want to test de-dedup, you should do it on a dedicated pool (even if it can be enabled on a particular dataset). 3 / Supermicro MBD-X10SL7-F (Fractal Design R5, SeaSonic X650 Gold) / Intel Xeon E3-1241 V3 4C/4T (Haswell) / I am new to TrueNAS, and wanted to experiment with dedup on a small amount of storage, rather than the whole pool, as most of that data are not ideal candidates for dedup So I turned it on for a single zvol, which is configured as an iSCSI "Device" type extent, and connected to a Windows Hyper-V initiator. TrueNas isn't being asked to store the DD data, that should be stored and handled on GELI encrypted pools continue to be detected and supported in the TrueNAS web interface as Legacy Encrypted pools. 1 system or you installed TrueNAS as the root user then created the admin user after initial Version: TrueNAS CORE 13. It is an i7-3770, 24GB ,1TB drive, boot drive & 16GB optane. When dedup is enabled, the checksum defined here overrides the checksum property. I got stuck in deduplication. I know in our production environment (NetApp) dedupe is somewhere around 50% savings, but I am reading that FreeNAS ZFS dedupe is a resource hog. 0T - - 11% 17% 1. iX. However, deduplication is a If deduplication is changed to Verify, ZFS will do a byte-to-byte comparison when two blocks have the same signature to make sure that the block contents are identical. I have a test system and eagerly waiting for fast_dedup to become available. zfs. 1. Please feel free to join us on the new TrueNAS Community Forums so I decided to verify the offsite server had the latest snapshot. 不像SHA256，fletcher4不能被信任为无碰撞，只适合与verify一起使用，verify来确保碰撞的处理。总的来说性能相对要好些。 通常如果不确定哪种的hash的效率跟高的话，即使用默认的设置dedup=on. But I am a bit worried after having read posts: Is Dedup essentially indexes every block in the pool to match duplicates "on the fly", and holding those in RAM takes quite a lot of memory. TrueNAS-13. com Products Enterprise Support Community Support Truenas Security Get TrueNAS Enterprise Download TrueNAS Community Edition About TrueNAS Careers Our machine has 256 GB RAM. Sparse Files: If you suspect sparse files, ensure the replica is handling them the same way as the original dataset. At it really would help with 1. 0-U6 Motherboard: SuperMicro X10SL7-F - On board SAS2 controller flashed to IT Mode CPU: Intel Xeon E3-1246 v3 Memory: 2 x 8 GB Samsung ECC M391 B1G73QHO-YKO + 2 x 8 GB Crucial EUDIMM 102472BD1160B I do run deduplicated datasets on my bigger, much more powerful primary Truenas box, but those are on an array of SSDs (2 Vdevs of 3x1Tb SSDs in Raidz1), with two 900P drives which host the dedup tables, so i know all about dedup'ing properly within Truenas. The replication seems to be performing successfully, however I would like to verify the snapshots are valid. 1 system or you installed TrueNAS as the root user then created the admin user after initial installation, you must verify the admin user is correctly configured. Here you see the DEDUP increase and then decrease (deleting of test files) with a Build FreeNAS-11. As this will mainly be a swift recovery/test environment utilizing template-deployed clones in VMware, I am seeing very high (+3. 1 on my secondary server and imported my zpool. "cobia-cobia replication w/ default certs - Unable to connect to remote system: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self-signed" Similar threads F "Failed to check for alert" after The difference is 10% for writes for bigger files ! I have a SLOG, DEDUP and Special VDEV on one 900p (usually 2 I want expand to three but the old system has not more PCIe slots). 1, Supermicro X10SRH-cF with E5 1650-v4 CPU, 96 GB ECC RAM, 8x However, I still have a question regarding the dedup ratio. 0-U5. Jun 17, 2020 Go to truenas r/truenas • Dedupe with ZFS's implemention is very rarely a gain for a very high RAM and CPU cost. Also, since dedup relies Did you enable dedup on your dataset? Read this. But, there's the "copies" value. We are considering purchasing an M50HA. 2 SSD 1TB (Mirror) [PCIe Passthrough to VM] 5x Seagate Exos 10TB (RAIDZ2) [via PCIe Passthrough of LSI HBA-9300-8i to VM] Deduplication requires SSDs that can sustain simultaneous read-write operations. Compressing data is recommended before using deduplication. None should be that guy. Deduplication means that identical data is only stored once, which can significantly reduce storage size. I have two TrueNAS machines- one (the primary) is replicating to a second (the backup). Can the dedup-feature of ZFS be used to remove such dup's (of course after de-raring the archives first and exporting the Deduplication is one technique ZFS can use to store file and other data in a pool. AIM: To help people looking at deduplication on TrueNAS 12+, what I've found on the way making it work on mine. The It’s best used for very targeted datasets that you know will benefit from it - for existing data, you can simulate deduplication by using sudo zdb -S yourpoolname although https://www. 4 xSamsung 850 EVO Basic (500GB, 2. 17x ONLINE 其中的 DEDUP 即为 dedup 率。 Provides general information on ZFS deduplication in TrueNAS, hardware recommendations, and useful deduplication CLI commands. When I checked the pool the error was on a file In theory dedup should let them boot faster if their data is highly dedup-able since I should have to do less seeking on disk and get more cache hits in memory. Dedup is a resource hog. I read in a previous post that on the backup machine, I could go to "snapshots," pick a snapshot Dell PowerEdge with 32gb RAM and 6 x 600gb 15k drives, iSCSI connectivity. Hello guys, I've run zdb -S on one of my zpools to see if dedup would help. Please refer to ZFS Dataset deduplication in TrueNAS CORE if you are curious to see how that post is going. I saved some gigabytes of storage and dedup table is small ~1GB in RAM max. 88:1. Deduplication Qutoa Dialog The Deduplication Quota for poolname shows the Quota dropdown list with three options for setting the maximum size limit the deduplication table can reach. 0. 00-IT Current deduplication in ZFS matches (for example) a sector (4KB) and if it founds a exact match it will deduplicate. On sustained mixed loads, such as 50GB+ file copies and multiple transfers, using TrueNAS 12 with a deduped pool and default config, I now get almost totally consistent and reliable ~330-400 MB/sec client-server, server-client, and server-server, Firstly the primary reason to use truenas is multiple ISCSI for games, with deduplication. ZFS supports deduplication as a feature. Davvo April 29, 2024, 7:13pm 8. In many sites, Veeam compression or deduplication is around 1. I installed 2x Samsung 480GB SM953s and set them up as a dedupe VDEV on the pool where the iSCSI target is located. . Each has dedup on, no compression, sync disabled. Have been running truenas for a while at home, but running a test at work with backup sets. Truenas用的是块状级，就是把文件分成块状，再计算块状哈希再去重 One of my RaidZ1 groups (3 drives) in the pool consistently showed 2044 errors after every scrub, triggering a flood of alerts. zfs set dedup=fletcher4,verify tank. 1-U7 Platform 2x Intel(R) Xeon(R) CPU X5650 @ 2. ZFS supports deduplication as a feature. Setting the value to verify has the same So I got deduplication enabled on some datasets. 4. Hi @HoneyBadger, Thank you very much for your detailed feedback! This has definitely helped me in this case to make a decision regarding the use or non-use of deduplication under ZFS and I will not use this for my purpose, because the cost / benefit ratio is too bad and my concerns about the failure of the deduplication table with regard to the recovery effort are Verify that the filesystems of the datasets are mounted by using the command; df -h the end result should be similar to. Local is only used for replicating data to another location on the same system. Deduplication is experimental in 24. 52T 12. Important Announcement for the TrueNAS Community. 3 in Q1 of 2012, or do a FreeNAS release with FreeBSD STABLE as the base. 5") - - Boot drives (maybe mess around trying out the thread to put swap here too TrueNAS Core 12. Everywhere I looked, the Truenas Scale “gurus” only suggested rebuilding the pool. TrueNAS. In effect instead of storing many copies of a book, it stores one copy and an arbitrary number of pointers to that one copy. I've seen "best practises" with ZFS+dedup of between 1GB-4GB of RAM per TB storage which is On - Select to use deduplication. Dedup takes about 5 GB of RAM per TB of deduped data, so your 65 TB pool could easily overflow a seemingly comfortable 256 GB RAM. It's unlikely FreeNAS will jump to using FreeBSD 9. Backup types, applications, and the diversity of VMs can all factor into Verify - Select to do a byte-to-byte comparison when two blocks have the same signature to verify the block contents are identical. (What's your use case for this?) FreeBSD HEAD and STABLE both have ZFS version 28, which supports dedup. I was curious about the option in TrueNAS 12 to specify a dedicated dedup vdev, as I'm thinking this could free up RAM. 04-BETA1 MB: ASUS P10S-I Series RAM: 32 GB CPU: Intel(R) Xeon(R) I performed a fresh install of truenas cobia 23. Main System: TrueNAS-13. Given that this drive is a little small, and all my VMs are the same OS (or one of two OSs), I was considering enabling deduplication and heavy compression on this SSD as a storage volume. 03 because as far as I know images aren't compressible. From what I experienced, an issue on a deduplication-enabled dataset can prevent you from mounting the whole pool (see my thread here). 1 system or you installed TrueNAS as the root user then created the admin user after initial Deduplication will easy bite you in the ass. x system as the remote server, the remote user is always root. If using an earlier TrueNAS 22. As of TrueNAS version 12. 1 system or you installed TrueNAS as the root user then created the admin user after initial I also do deduplication on the volume, and I can't really afford a file server with several hundred GB of ECC RAM for ZFS dedup, Windows handles this fine with far less RAM. However, I can't seem to get the dupmerge to run. If several files contain the same pieces (blocks) of data, or any other pool data occurs more than once in the pool, ZFS will store just one copy of it. New posts Search forums Blog Forum Rules TrueNAS Community SLA Need Help Logging In? What's new. We’re also excited to announce its official availability to our Community Important Announcement for the TrueNAS Community. Replication Wizard Method Start the Replication Wizard, go to Tasks > Replication Task and click ADD. Create some jails and deploy services instead. Deduplication can improve storage capacity but is RAM intensive. 0, which is the next FreeBSD release scheduled (for this fall), so there are two choices, wait for 8. 1 system or you installed TrueNAS as the root user then created the admin user after initial Aiming to mostly replicate the build from @Stux (with some mods, hopefully around about as good as that link). There are 2 12TB sparse drives To get the dedup data down to a managable level, they zvols are 1MB block sizes. 0-U1, a decrypted GELI pool can migrate data to a new ZFS encrypted pool using the Replication Wizard. 0-rc3 · openzfs/zfs · GitHub?. Snapshots create pointers to the blocks that existed when the snapshot was created and do not use additional physical blocks. Does anyone have any recommended setup steps (or . If you read the ZFS manual pages, some checksum algorithms are not recommended for De-Dup. 60. It is a raidz1 5 x 4TB pool. 在 TrueNAS 中运行 zpool list 进行查看。 运行结果： root@truenas[~]# zpool list NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT Storage 14. Hi I am testing on an old machine. Even for use cases where it seems like it would be useful like multiple VMs. 99 is TrueNAS. Looking on disk I see all the targets shown as their full capacity. Could I theoretically take an extra SSD and allocate this as a dedicated dedup vdev? Would I need redundancy for this, like a mirror? Heracles Wizard. that works, does not ask for a password, but it vomits out a massive amount of rubbish about certs or keys whose identity TrueNAS Scale VM: 8 Cores (Host mode) 32 GiB ECC RAM 2x Micron Gen-4 M. You don't want your dedup data to have to be fetched as disk IO speed! As a rough guide the dedup table for my 40 TB pool is about 200 *million* entries at a few hundred bytes each. 25:1) dedup ratios, with dedup+compression ratios hitting +4. Since hash collisions Provides general information on ZFS deduplication in TrueNAS, hardware recommendations, and useful deduplication CLI commands. When installing something like Windows, if you look at what ends up installed, a lot of it is indeed data that could theoretically be dedup'd if there are multiple instances, and it may take a significant amount of space with crap that'll never he If using a TrueNAS 13. Please feel free to join us on the new TrueNAS Community Forums. I would suggest everyone interested in deduplication to wait until fast You can read more about how TrueNAS protects your data here. Off - Select to not use deduplication. deb packages available) that contain Release zfs-2. It’s ZFS v28 includes deduplication, which can be enabled at the dataset level. Created two identical sparce 600GB zvlos. Even should you wish to waste resources on purpose, do it with things that will not jeopardize your data. Verify - Select to do a byte-to-byte comparison when two blocks have the same signature to verify the block contents are identical. Especially when dealing with VM data instead of Thinking out loud here: Given that there’s lots of room in the pool, could dedupe be turned off after all? - Turn off dedupe on pool, newly written files won’t use it - Create new dataset - rsync -ha data across on SSH session to FreeNAS - verify it’s all there - swing shares over - delete old dataset -> dedupe gone - repeat performance test Thank you for the ressource. A VM environment offers interesting challenges, some of which are well-suited to ZFS. Unfortunately, I cannot find a way to remotely check the If using a TrueNAS 13. The shell (running Truenas Scale 22. dedup=off|on|verify|sha256[,verify]|sha512[,verify]|skein[,verify]|edonr,verify Configures deduplication for a dataset. This is for me with a dataset at 1. Improve this question. Auto is the default option, which allows the system to set the quota and the size of a dedicated dedup VDEV. philipp philipp. Also two ISCSI for each, both the same with the 4k This is valuable information for monitoring, and available through standard zfs get compressratio from the CLI, but a graphical representation is easier for end-users to quickly verify. Use cases that demand high read performance have aligned well with deduplication, given the compressed and deduplicated data is only stored once in ZFS read cache. Because it's block level the data doesn't often line up nicely for dedupe. I'm in a semi-similar position, where I want to effectively dedup by creating a lot of hardlinks. Consider that: You very likely don't have the RAM to handle deduplication. This pool started as a single disk 120GB SSD for testing purposes and I added a 250GB disk to make it a mirror with the help of this post by Duran, checked that autoexpand=on and replaced the old disk with another 250GB SSD to make the pool bigger. Given that the box has 32gb of RAM, it's an SSD, and the drive is only 120gb which I intend to fill with largely duplicated data, it seems as though this is Important Announcement for the TrueNAS Community. – Michael Hampton. Pay special attention to the note under Table 6. If using a TrueNAS 13. If you have a sufficiently fast network pipe, running it on a separate machine entirely Would it be a good idea to create a small 150GB dataset with deduplication on and then copy the photos to that? I know compression is recommended instead but I only get a compression ratio of 1. We copied a similar dataset to a windows server with post processing dedup enabled and were getting around 60% dedup, they are monthly copies of the same data for backup purposes so expect the data to be highly deduplicatable. 0 represents a new era for both the project and the file system itself, and iXsystems is proud to have contributed to such a significant engineering accomplishment. Commented Aug 20, 2019 at 17:29. This property works for both legacy and fast dedup tables. 1 Like. This forum has become READ-ONLY for historical purposes. I read in another post or somewhere to verify that ssh is working by connecting from source to dest using shell on the source. 10. Native ZFS encryption sounds like a great and simple recipe to protect data in case of theft and/or disk warranty. Has there been any official word from TrueNAS on how soon once zfs-2. and other discussion groups to help verify the amount of storage you need for Veeam backup. メモリ16GBは人権の今、ZFSの重複排除(dedup)を解禁する （2020-12-15 追記） dedup有効状態で10ヵ月弱使ってみたけど、やっぱりまだ解禁しない方がよさげ。メモリ的には余裕だが、ファイル削除に時間がかかるようになったり微妙に怪しげな挙動をすることがある（何となくレコード毎に重複 这个问题我就当我配置不够好了，毕竟ZFS很吃内存 但问题是我在控制页查看储存池用量，这根本就没去重啊，已用空间就是文件x3的大小 Truenas用的是块状级，就是把文件分成块状，再计算块状哈希再去重 然而文件那几个部分被 Guide for deploying TrueNAS systems as a Veeam backup solution. 12. 0-U6. I really suggest reading it a few times Main: TrueNAS 13 Supermicro X11SSM-F as @Ericloewe pointed out: blocks writen after an upgrade do not mach the old blocks and thus would not validate for Deduplication So, in short: While ZSTD would keep being backwardscompatible new blocks wont be the same after some updates. They were cheap. 0 goes live it would take for us to get the official update? Edit : It was the internet box not handling the trafic A mini switch to connect both servers works, and now everything is copying. 0 hit the RELEASE milestone on November 30, 2020. ), so is there any offline deduplication software out there? truenas; deduplication; Share. 55x ratio. Please feel free to join us on the new TrueNAS Community Forums Here's a quote from the manual "If you plan to use ZFS deduplication, ensure you have at least 5 GB RAM per TB of storage to be I am using TrueNAS core as a backend storage device for an ESXI host. 999% of users, including you. Deduplication One thing that can be important for De-Dup is the checksum algorithm. I'll mark this thread as resolved, thank you @jgreco and @HoneyBadger for the help ! Root cause : Probably defect PCI card SAS3008 + deduplication enabled Fix : Mount pool as readonly through the CLI, copy everything to So either the copied files conserve the dedup parameter, or the deletion of the dedup dataset failed and now we are in this state where TrueNas tries to reference some data with dedup enabled, but this data does not exist anymore Hi, I am new to TrueNAS and currently setting up a simple DIY home server NAS. However, deduplication is a compromise and balance The ZFS Deduplication | TrueNAS Documentation Hub states between 1 and 3 GB 5GB per TB of dedupled data is suggested to avoid the nasty situation of having the DDT (deduplication table) outside your RAM usually meaning on HDD; it however depends on the average record size!. See thread: Compression Ratio vanished in SCALE? Impact Advantage: Displaying the compression and/or deduplication ratios as a “data reduction rat Deduplication: Run zfs get dedup main/user SSD/user to ensure deduplication is either enabled or disabled consistently across both datasets. 101 4 4 bronze badges. The TrueNAS Community has now been moved. To test any Truenas storage functionality, one of the first things needed is a pool. Verify Admin User Settings a. Primary server is also 23. Truenas is running as a virtual machine in proxmox. And I don't know WTH is this value. With SSH-based replications, configure the transport Well, that's maybe excessively negative. What are your thoughts? Do I have enough horsepower for it? I would love to realize even 30-40% savings with dedupe. That leaves dedup as a completely useless feature for 99. You'd need a crapton of RAM. 10 later in 2024. So if I have a dataset with dedup and compression enabled, which occupies 800G of physical disk space, but in reality there are over 6T of files - 6T is what "zfs send" will send over to the receiving side on the first run, which sucks : In all cases, dedup is never the way to get more space and trying to achieve that is its only purpose. 1. 3a. Either I configured something wrong or the ZFS deduplication feature is N O T on block level. 67GHz on Supermicro X8DA3 SuperWorkstation 7046A-3 (this casing looks like mine) Memory 40GB Disks 8x 3TB HDD RAID Z2 Pool (encrypted) Adapter Avago SAS9211-8i FW Revision 20. I created a pool 1TB with the optane as a dedup volume. 5x to 2x, which is more of a reference than a rule. The first result is a blog post by Jeff Bonwick which explains that there's no limit on how much you can deduplicate, it's just that the tables will spill into l2arc and eventually to disk, which will be like hitting a wall Hello, I am a bit lost on whats wrong with my pool (mirror) consisting of two 250GB SSDs with replication on. 5T 2. So dedup is potentially useful for me TrueNAS is a BSD system (or Linux, if you happened to be running SCALE) but should be thought of as more of an appliance - build whatever duplicate-hunting solution you want to use in a jail or VM and run it there to avoid causing lasting impact on the FreeNAS/TrueNAS OS itself. 03. Offline de-duplication in TrueNAS SCALE with the new block cloning feature Congratulations to the OpenZFS Community! OpenZFS 2. Read more in the blog announcement: On - Select to use deduplication. Zfs set dedup = verify silo 你也可以用其他方法，利用一个更简单的散列算法来减少所需的处理能力并将它与验证功能结合在一起以提高重复数据删除的整体速度： Zfs set dedup =fletcher 4，，verify silo ZFS的重复数据删除功能可根据文件系统的大小进行调整。 This article (titled "How to Determine Memory Requirements for ZFS Deduplication") is the 2nd organic result when I Google "zfs deduplication". ivfou lwxpxir hetjo gtsak xemi ugjps bxuyb ucyyae ubcjyj bwsfk mpt solua roqgh leex dnisym