From fd2fe18de3eb245aaab78abf924301e3d4a1734f Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Mon, 6 Jun 2022 16:44:47 +0200
Subject: [PATCH] in db convert: map size up to 1TB on 64-bit systems

---
 src/db/bin/convert.rs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/db/bin/convert.rs b/src/db/bin/convert.rs
index 636bd834..e5778abb 100644
--- a/src/db/bin/convert.rs
+++ b/src/db/bin/convert.rs
@@ -54,9 +54,17 @@ fn open_db(path: PathBuf, engine: String) -> Result<Db> {
 			std::fs::create_dir_all(&path).map_err(|e| {
 				Error(format!("Unable to create LMDB data directory: {}", e).into())
 			})?;
+
+			let map_size = if u32::MAX as usize == usize::MAX {
+				eprintln!("LMDB is not recommended on 32-bit systems, database size will be limited");
+				1usize << 30 // 1GB for 32-bit systems
+			} else {
+				1usize << 40 // 1TB for 64-bit systems
+			};
+
 			let db = lmdb_adapter::heed::EnvOpenOptions::new()
 				.max_dbs(100)
-				.map_size(1usize << 30)
+				.map_size(map_size)
 				.open(&path)
 				.unwrap();
 			Ok(lmdb_adapter::LmdbDb::init(db))