In a discussion about building a custom EL tool, a commenter suggests there is a market gap because incumbent tools like Fivetran often handle schema drift poorly and struggle with recovery and...

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    "summary": "In a discussion about building a custom EL tool, a commenter suggests there is a market gap because incumbent tools like Fivetran often handle schema drift poorly and struggle with recovery and idempotency, leading to duplicate rows after failed loads.",
    "category": "reliability",
    "comments": [
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        "url": "https://www.reddit.com/r/snowflake/comments/1wm16cg/comment/pb4p5qg/",
        "depth": 0,
        "score": 6,
        "author": "NW1969",
        "excerpt": "Before you wrote your own ETL tool, which of the many existing ETL tools did you consider and why did you reject them? What does your tool provide that none of the existing tools provides?",
        "posted_at": "2026-09-21T09:25:30.000Z",
        "author_url": "https://www.reddit.com/user/NW1969/"
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        "author": "Defiant_Month_497",
        "excerpt": "CDC brother CDC replication",
        "posted_at": "2026-09-21T03:18:57.000Z",
        "author_url": "https://www.reddit.com/user/Defiant_Month_497/"
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        "author": "Muted_Jellyfish_6784",
        "excerpt": "There is room even with Fivetran and Airbyte out there, the gap is usually schema drift handling and how cleanly the tool recovers from a source changing shape mid-sync without dropping columns. Stress test idempotency, what happens on a replay after a failed load, duplicate rows from a bad retry are the top complaint about EL tools in production. Document how it handles late-arriving data too, th",
        "posted_at": "2026-09-21T15:40:18.000Z",
        "author_url": "https://www.reddit.com/user/Muted_Jellyfish_6784/"
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        "author": "PrimeWilliam",
        "excerpt": "The most useful next step would be a reproducible benchmark against a staged Parquet load plus CDC, using the same dataset. Initial-load speed matters, but recovery after interruption, snapshot-to-CDC consistency, delete handling, reconciliation, and credential security are probably the real differentiators. Those results would make it much easier to tell whether this fills a genuine gap or mainly",
        "posted_at": "2026-09-21T08:58:16.000Z",
        "author_url": "https://www.reddit.com/user/PrimeWilliam/"
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        "author": "RazzmatazzReal5596",
        "excerpt": "Very cool! Are there any major advantages over using something like Openflow?",
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      "[comment u/Muted_Jellyfish_6784] Stress test idempotency, what happens on a replay after a failed load, duplicate rows from a bad retry are the top complaint about EL tools in production."
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    "post_text": "Hi Community, I'll try not to sound like a sales person here. My team and I built this tool for us to use to move data from major databases(mysql, postgres, sql server mainly) to snowflake(I know it's pretty limited, but that's enough for us for now). Just want to know if the community thinks it's a good idea to open it up to the community for free or it's just unique cases just for us. It's mainly to solve some of the pains you might have encountered as well when doing EL to snowflake as a data engineer or architect.\n\nAnyway, things that bothers me and my team a lot were as follows, you can comment on how you solve this instead of writing a tool to do the syncing(and make us look stupid of course)\n\nBig database table, 1+ billion records syncing - if you've done this scale before, you know what I'm talking about, it's super slow.\n\nExport existing views instead of tables!!! - I don't see why the existing tools would not do that.\n\nSchedule per table! - Why do I have to run the syncing to the WHOLE database at scheduled time.... it doesn't make sense.\n\nDelete detections - Seriously, why this is so hard to achieve...\n\nSOX Audit - it's a perfect use case for the EL tool IMO, why isn't there one already.\n\netc...\n\nThese are some main pain points we faced during our operations, wanna see your thoughts as to how you solve these problems, and if our in house tool that solved these...",
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    "post_title": "My team and I built a EL tool especially for snowflake, not sure if we are reinventing the wheels or it's worth sharing with the community. let me know what you think.",
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