A list of puns related to "Rateless Erasure Code"
So I've been using bcachefs in raid1 for some time, on different machines, and 2 different linux distributions (void and arch).
So far so good I'm pretty happy at how it behaves, trew some load at it copying terabytes of data, compressing/uncompressing big restic archives, and so on, many small files and many big files, all mixed :P
Now I'd like to try erasure coding, what's the correct syntax to do it? I seem to not find documents or posts newer than 2020 on the internet, and 1 whole year has passed so I'm asking if there's anything knew that I need to know, whould these command be ok to create a raid6 set with 4 disks?
bcachefs format --replicas=3 --erasure_code /dev/sda /dev/sdb /dev/sdc /dev/sdd
mount -t bcachefs -o ec /dev/sda:/dev/sdb:/dev/sdc:/dev/sdd /mnt/bcachefs
Thanks to anybody who can shed some light :)
Welcome one and all to the rock show! It's that time of the calendar where I reveal and countdown the results of the Ultimate Grunge Rate!
Today we will be revealing SONGS 51-35 and BONUS 15-11. And we'll start here at 9:00 PDT (when the post here turns an hour old)
That's a lotta stuff! Wow I hope you all are properly caffeinated for this.
Number of participants: 48 49 brave souls
Average score: 7.560 (grunge enthusiasts!)
Average controversy score: 1.793
Amount of YEAHS: endless, nameless, countless,
Pearl Jam: 6/11
Nirvana: 11/13
Alice in Chains: 6/12
Soundgarden: 11/15
I have started playing with EC pools to better understand them from a practical perspective.
Setup: 4 nodes, each with 4 OSD's
I have defined a EC Profile as follows:
# ceph osd erasure-code-profile set 2osd k=5 m=3 crush-failure-domain=host
Then, when I want to create a pool, I get his error.
# ceph osd pool create ectest 128 128 erasure 2osdError EINVAL: pool size is bigger than the crush rule max size
I have tried other PG and PGP sizes, but it makes no difference, the error persists, even if I go down to 8 pg's.
My replicated pools have pg 128.
How do I calculate the number of pg's without exceeding the crush rule max size? Is this error misleading, ie is these something else that I have not set up properly?
My OSD hosts are running with Mellanox (now nVidia) Connectx 4 LX cards which support limited EC offload; has anyone been able to get ceph to use this hardware and free up cpu resources?
I'm looking into moving one of my data pools from replia 2 to erasure coding. Mostly movies and large read-heavy files on it. I have 6 OSDs. My understanding is that k+m should be equal or less than the number of OSDs. Are there any downsides to doing k=5 m=1? If I'm doing my math correctly, it would be approx 1.2GB per each GB stored with one OSD failure tolerance. Is this all correct?
A cishet man I matched with on Tinder once again tried to pull the βI bet I can make you straightβ shit as his opening line. Instead of just unmatching right away I said, βAnd I bet I can make you bi.β
Him: βNo way Iβm 100% straight.β
Me: βNow you realize how dumb you sound.β
He promptly unmatched me. π
What is the storage overhead for an erasure coded cephfs pool?
--
My home ceph cluster has a 7 plus 2 erasure coded cephfs pool that appears to be consuming the storage space of a 5 plus 2 pool. The ratio of used/stored has been 1.4 (7/5 or k+m=5+2) ever since I started adding data and drives to the pool. I do not remember this being the case with the 7 plus 2 rbd pool I used in a previous iteration of this cluster. The R3 pools use the amount of space expected. The placement groups have 9 shards (7 plus 2), there are no snapshots, no encryption, and compression is not enabled. (Edit 3: To be clear, I am not talking about the MAX AVAIL
column for the pools, but the ratio between the USED
and STORED
columns. I understand that an imbalance in OSD usage will negatively impact the MAX AVAIL
for the pools, but it does not have an effect on either STORED
or USED
.)
--
I will probably create another erasure coded pool (5 plus 2) to test its overhead, but I wanted to ask the experts first.
--
I do plan on adding a couple more drives and doubling the number of placement groups, but doing this has not changed the used/stored ratio while I was building out and filling this cluster over the past few months.
--
Summarized (for legibility) cluster info:
ceph df
--- RAW STORAGE ---
CLASS | SIZE | AVAIL | USED | RAW USED | %RAW USED |
---|---|---|---|---|---|
hdd | 129 TiB | 50 TiB | 79 TiB | 79 TiB | 61.21 |
ssd | 710 GiB | 308 GiB | 398 GiB | 402 GiB | 56.57 |
TOTAL | 130 TiB | 50 TiB | 79 TiB | 79 TiB | 61.19 |
--
--- POOLS ---
POOL | ID | STORED | OBJECTS | USED | %USED | MAX AVAIL | CLASS |
---|---|---|---|---|---|---|---|
device_health_metrics | 1 | 33 MiB | 34 | 99 MiB | 0.04 | 89 GiB | ssd |
rbd.vm | 2 | 170 GiB | 69.70k | 397 GiB | 59.84 | 89 GiB | ssd |
cephfs.killroy.meta | 3 | 459 MiB | 12.31k | 1.3 GiB | 0.50 | 89 GiB | ssd |
cephfs.killroy.data | 4 | 806 GiB | 324.99k | 2.4 TiB | 6.81 | 11 TiB | hdd |
cephfs.killroy.data-r3-host-ssd | 5 | 0 B | 0 | 0 B | 0 | 89 GiB | ssd |
cephfs.killroy.data-7p2-osd-hdd | 6 | 55 TiB | 14.29M | 77 TiB | 70.29 | 25 TiB | hdd |
--
--
ceph osd df
CLASS | SIZE | RAW USE | DATA | OMAP | META | AVAIL | %USE |
---|---|---|---|---|---|---|---|
hdd | 129.154 TiB | 79.056 TiB | 78.887 TiB | 38 MiB | 173 GiB | 50.098 TiB | 61.21% |
ssd | 709.601 GiB | 401.412 GiB | 397.790 GiB |
As per usual, feel free to delete this if it doesnβt fit, but I have something to get off my chest. Earlier this week, a user cross-posted a meme from r/DankMemes on r/BlantantMisogyny that implied women would be upset if a war broke out and mandatory Selective Service enrollment included women. There were a lot of sexist comments under the post as well. (Surprise, surprise! Reddit sexism never fails to deliver.) This peeved me off for a number of reasons. I have a great deal to say about this- as a female veteran, historian, and feminist, so please bear with me.
So much is wrong about their interpretation of womenβs contribution to warfighting efforts, the overwhelming effects of total war on women, and the general erasure of female veterans. I took multiple courses for my undergraduate degree in history about specific wars, including the Civil War and World War II. In every instance I was give the opportunity to choose my own topic, I always did my research papers on womenβs contributions to warfighting and the wartime economy. Therefore, I wanted to give everyone some food for thought and ammunition the next time assholes decide to pretend women arenβt affected by war and/or weβre weak, unpatriotic cowards.
Β· First off, letβs talk about the effects of war on civilian women. *Wars always take place somewhere.* They ainβt being fought in space, yβall. The women who live in these locations are always the part of the population hardest hit. Why? Their fathers and husbands are always off fighting the war, so they are already running their homes and acting as the primary breadwinner. Even worse, the United Nations recognizes rape as a war crime because it happens to so many civilian women on the battlefront. It is used as an instrument of war against the other side. In addition, women are often forced into unpaid prostitution against their will to serve the predominantly male military presence.
Β· During wartime, women become primary breadwinners for their families. During the Civil War, women ran their familyβs farms and hunted for food, including squirrels and other rodents, to survive. During World War II, women were the primary workforce and were vital to the manufacturing of munitions, aircraft, and other items needed by the military. They were vital to the manufacturing of the atomic bomb at every step, including the research side at Los Alamos. Women were often forced out of these jobs by men returning from the war, even when they wanted to stay.
... keep reading on reddit β‘I've come across so many books where a couple will wake up in the morning and immediately start kissing. But the whole time I'm thinking it's not very romantic and kinda gross. I cannot stand morning breath but so it's as if it doesn't exist in a lot of books lmao. I know it's just fiction, but I always immediately start thinking about how they're literally kissing without brushing their teeth.
I'm not the only one that dwells on this, right?
Was anybody else triggered by Bill insisting that Jimmy Gβs career is at all similar to Eli Manningβs?
Eli will be a hall of fame quarterback, heβs ninth all time in passing yards and tenth in passing TDs with two Super Bowls wins.
He did win the 2008 Super Bowl largely on the back of the giants running game and pass rush but was without question the giants best player during the 2011 run and is one of only five players in NFL history to win multiple Super Bowl MVPs (Brady, Montana, Starr, and Bradshaw being the other four).
His longevity and knack for 4th quarter comebacks made him an all time great, I will not stand for the Eli disrespect from a still salty pats fan.
edit, the comments section of this post has devolved into an Eli Manning hate fest. Regardless of your personal feelings towards Eli or whether or not you think Romo or Rivers was better (they werenβt, fight me), Eli Manning will be a hall of famer and had a far more successful and distinguished career than Jimmy G has or will have
Edit: the mods of /r/lgbt have reviewed the ban and decided to unban me. I have learned a lot from the comments in this thread and will choose my wording more carefully going forward.
There was a thread on /r/lgbt that was debating whether straight people should be allowed in queer spaces.
A trans commenter correctly pointed that some straight people are queer. The reply clarified that they meant cishet people. Then the reply to that said what about "cishet asexual" people.
I said that asexual and heterosexual are oxymorons. Because the person I was replying to had a trans flair, I thought I'd make the analogy to how you can't be cis and trans at the same time.
That comment got me permanently banned. I'm pretty upset because I always assumed that /r/lgbt was a safe space for aces too. Pretty gutwrenching to be told that a community that I thought I was part of would kick me out for standing up for myself so I'm retreating back to this subreddit for support.
It know its regularly discussed on this forum how often we are discredited as members of the LGBTQ+ community, but I think it's wild how even people close to those of us who identify as bi can unintentionally commit microagressions.
I was just taking a diversity & inclusion survey for my office, and my partner (M) was looking over my shoulder as I (F) clicked the box for identifying as the LGBTQ+ community, and he straight up said "You shouldn't click that, I think your work is looking for someone who is openly gay, or actually represents diversity - since you're dating me I don't think you count now." I was FLABERGASTED. Just because I am currently in a "straight" appearing relationship it does not discredit my bisexuality and certainly does not erase my identification as a part of the LGBTQ+ community?! I felt like I didn't have a great response to his comment because I was so flustered - he is usually very supportive and comfortable with my bi identity but this proved to me that he doesn't take it as seriously as I thought.
Sorry for the mini-rant, just had to get it out there in a community that gets it.
Like I see a lot of characters described as either homosexual or heterosexual based on the sex of the one romantic interest they have in the show, but it seems like we're making assumptions about their entire life based on a snippet.
Bo/Glimmer both get called heterosexual, Adora/Catra both get called homosexual, but couldn't all four actually be bi and they just so happen to have found a special person who is special because of things other than their sex?
It's like there's a "they're not bi until we see evidence they are" opt-in, but why not an opt-out approach like "assume everyone is bi unless we see them overtly express disgust for an entire sex/gender" ?
I just saw a wonderful TikTok by Mari @genderfenderbender about genital variation in intersex people and how intersex infants are at risk of being subjected to unnecessary and often physically and/or psychologically harmful surgery.
https://vm.tiktok.com/TTPdhfXbGk/
In this moment I am thinking about how often intersex people have been completely left out of 'genital preference' discourse. Genitals with variations are valid and natural, and to me this clearly shows that the arguments that 'genital preferences are just inherent, not socially constructed, and not deserving of deep interrogation' are both ignorant and harmful.
Thinking about how a savvy Pepino just spied Hillary in the wild at the Natural Museum in NYC with the kids and OF COURSE a Spanish-speaking nanny made me angry again
Like, EVERYONE SEES THEM OUT WITH THE NANNIES.
At least one or two for every 2-3 kids, sometimes more...
Why does she INSIST on hiding them?
Aside from a long forgotten "Greek Yaya" nanny/cook whose picture she posted YEARS ago to help sell the "I'm Mediterranean!" Con (forced to reveal she wasn't actually related to her later on in her comments) I have NEVER seen her acknowledge any of her help
The fact that she apes their accents and co-opted their real immigrant experience ("I was 19 when I came to NY; I had to be taught American slang; my family couldn't pronounce "Baldwin;" we had no TV/knew no American pop culture growing up") is so offensive
Even POS Alec had the balls to publicly thank them that one time on his IG
But Hillary?
Crickets.
Erasure.
Completely removed from her self-curated online existence
It is "Maddening." πΏπ‘
thoughts and opinions on this? i posted on a different sub about my heritage (i am ndee and black, but physically present as just native) and got a comment about how i look βmestizaβ.
as an indigenous woman, i hate being called mestiza, mexican, hispanic, spanish, etc. because it IS NOT me. i identify with my indigenousness stronger than anything else and was raised in an indigenous household, by an indigenous mother, with my heritage constantly surrounding me. i donβt want to culturally associate with the people that colonized my family.
can anyone else relate to this, or share their thoughts?
Yeah, it's common to see people blabbering about Mary being CANONICALLY Lesbian. But when someone mention that she show interest in Suzui too (she's blushing to him more than once), they just "Oh come on that's just one time", "that's fake", something like that. It's exactly the same attitude when you told a bisexual girl that she's actually lesbian, and her interest in boys are just a phase or something like that. How hilarious, they act like they are some LGBT activist and even accuse Mary x Suzui shippers of "homophobic" (how fucking nonsense), while they are literally performing bi-erasure, trying to cancel the bisexual part of LGBT community.
Just so you know, unless a character's sexual orientation is canonically confirmed, I will just consider them bisexual and ship them with any boy/girl I like. End of the story!
Nowadays, Marvel films are insanely popular worldwide, grossing in the hundreds of millions across the world. As a result, the America they present via Marvel, is going to be what foreigners will automatically associate in their mental image of the USA. However, it is clear that Marvel, purposefully or not, is still presenting an image of an USA which doesn't apply anymore. I'm referring to the marginalization of Asian Americans, which is most evident in the Spiderman franchise. Simply put, Asians aren't represented accurately to their actual population percentage.
Let's start with Tom Holland's Spiderman, in which they recently released a third film. The main protagonist in the movie, Peter Parker (Spiderman), is a Gen Z "science nerd" living in Queens, NYC. He goes to a high school called "Midtown High", which is based on high-achieving academic magnet high schools in NYC, such as Stuyvesant or Bronx Science. Racial demographic wise, these schools are very heavily Asian. Like straight up 75% of the students are either Chinese American, Indian or Korean, which could be corroborated by publically released admission records. This is because Asian American parents in NYC are hyperfocused on their children's education; both parents and kids sacrifice everything to get their children into the best schools. Also, many parts of NYC have a significant amount of Asians, as many Mainland Chinese have migrated over during the last 20 years. Statistically speaking, Queens is currently 30% Asian, which outnumbers the white population (25%).
Hence, you would expect such demographics to be represented in Spiderman films. But obviously, this doesn't happen.
Here is an example of Peter Parker's top magnet high school (Midtown High), as shown in Spiderman NWH. Bulk students are white, with some blacks mixed in. You see like 2-3 ABCs in the whole movie, if even that.
Not Tom Holland's Spiderman but Andrew Garfield, same deal
Meanwhile, if you actually look at actual student pictures from NYC top high schools (Stu
... keep reading on reddit β‘Hey people, I am looking for some guidance for "expanding" a running cephfs on an erasure-coded pool. If I'm right an erasure-coded pool does no grow when adding disk, due to the splicing of the objects into data an parity chunks. So this leaves three options to me in my mind.
The first option seems to be unsupported. The second could be possible since there are the commands add_pool and rm_pool with fs, but it is also stated that the creation pool can not be removed. So does any of you encountered this problem and how did you manage it. I would like to continue EC due to the reduced overhead, but I know that all the problems would be fixed, by using a replicated pool.
Thanks already for any tips...
Flair says bigotry but it's more like ignorance.
I was listening to the ologies podcast with the sexologist and she said that "everyone likes boobs", and it made me feel really invalidated as a bi woman. I don't actually know whether her claim is true or not, but I feel like such a sweeping generalization wouldn't be true for straight women or gay men? It feels like bi erasure and it stings especially hard to hear coming from a professional who works in the field of sexuality.
Other than that comment of hers, I really enjoyed the rest of the episode.
Edit: I have explained more in depth the underlying factors that contributed to my initial reaction to hearing this phrase being used by a professional. After reading y'alls comments, I have widened my perspective to be more accommodating to some of the different (and sometimes contrasting) views here. I fully appreciate everyone's input on the matter.
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